Skip to content
Audit Complete

Results for https://waterstones.com

Visit site
Spain Spain · Madrid Completed: Apr 22, 2026 21:28 UTC
Download JSON Download Markdown Report

Mobile 375 × 812

Screenshot of the audited page (Mobile 375×812)

Desktop 1440 × 900

Screenshot of the audited page (Desktop 1440×900)
D68

Site Health

Score: 68 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Several missing protections leave your users and data exposed.

Several issues make your site difficult for assistive technology users.

Missing signals may be hurting your search visibility.

Good server performance with room for optimization.

Mostly compliant — a few items need attention.

Missing metadata means poor previews on social media and search.

Reasonable footprint with room for optimization.

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

How the composite score is calculated

How you compare

AngularJS · 396 peers
You 68
·
Avg 73
At average
0 50 100
Better than 2% of AngularJS sites See full AngularJS benchmark →
Apple · 1212 peers
You 68
·
Avg 72
At average
0 50 100
Better than 3% of Apple sites See full Apple benchmark →

Top Priorities (5)

1

Content-Security-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers
2

HSTS header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers
3

No Content-Security-Policy header found

Security gaps expose your site and users to attacks, eroding trust.

Security › Content Security Policy
4

120 third-party resources (100% of weight)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Inventory
5

121 HTTP requests — consider bundling or reducing

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Budget
View fix priority matrix

Fix Priority Matrix

5 findings

Quick Wins

3

High impact, low effort — start here.

Strategic

2

High impact, requires investment.

Easy Improvements

0

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

0

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →
BeaverCheck badge
Embed this badge
[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwaterstones.com)](https://beavercheck.com/results/1129548e-289e-4cb5-9e34-d4f9f17bdb9f)
<a href="https://beavercheck.com/results/1129548e-289e-4cb5-9e34-d4f9f17bdb9f"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fwaterstones.com" alt="BeaverCheck Score"></a>
https://beavercheck.com/badge?url=https%3A%2F%2Fwaterstones.com

This badge auto-updates with your latest scan result.

What fixing these means

Your site has several issues that may be affecting user experience and business outcomes. Your LCP of 15.1s exceeds Google's 2.5s 'Good' threshold and the 2 performance issues below directly contribute to it. Addressing the critical issues below would have the most immediate impact on your user trust.

3 security gaps detected — browsers may warn visitors about your site.
Your LCP is 15.1s — fixing the 2 performance criticals could bring it under Google's 2.5s 'Good' threshold.
C
Could reach Estimate based on resolving critical issues

Conversion Barriers

2 critical 6 warning

8 barrier(s) likely increasing bounce by ~30%.

Speed (2)

Page takes 15.1s to load

+12% bounce

Users abandon at ~3s — you're 12.6s over the 2.5s threshold

Fix: Optimize render-blocking resources, preload the hero image, and compress images

Page feels frozen for 1.4s

+5% bounce

Clicks on the primary CTA are ignored while JavaScript runs

Fix: Break up long tasks; defer non-critical JavaScript to post-hydration

Trust (2)

No HSTS header

+1% bounce

Returning visitors are briefly exposed to downgrade attacks on first request

Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains

No Content-Security-Policy header

+1% bounce

Higher XSS blast radius — one compromised script can exfiltrate the checkout form

Fix: Ship a reporting-only CSP first, then enforce once violations are clean

Content (3)

No Open Graph tags

+2% bounce

Links shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop

Fix: Add og:title, og:description, og:image, og:url to the page head

No structured data

+2% bounce

No rich-result eligibility in Google — lower SERP CTR vs competitors with stars and prices

Fix: Add JSON-LD for your page type (Product, Article, FAQPage, LocalBusiness, …)

Thin content

+3% bounce

Under 300 words — visitors bounce looking for substance, search engines rank competitors first

Fix: Add a substantive FAQ, product detail, or case-study section

Navigation (1)

No skip-to-content link

+1% bounce

Keyboard and screen-reader users must tab through the entire header on every page

Fix: Add a visible-on-focus <a href="#main">Skip to content</a> as the first focusable element

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Return on Investment

£413 investment → £0.62/month returns + GBP 18,050,000 risk avoided

Payback period: > 2 years First-year ROI: -98%

Investment

£413

6h · 5 findings

Monthly returns

£0.62 /mo

~£7.47 / year

  • Bandwidth savings £0.62

Regulatory risk avoided

GBP 18,050,000

if kept compliant

  • UK GDPR GBP 17,500,000
  • PECR GBP 500,000
  • Equality Act 2010 GBP 50,000

£113 — in quick wins — start here for the fastest payback

Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.

Full methodology & sources

Estimated Remediation Cost

£413

5.5 developer hours at £75/hr

Based on United Kingdom rates (£75/hr)

Quick wins
£113 3 fixes in ~90 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions
£ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

£1,504,167 / month at risk

~£18,050,007 / year if left unfixed

Compliance Risk

£18,050,000

UK GDPRPECREquality Act 2010
  • No privacy policy link detected
    UK GDPR: GBP 10,000 – GBP 17,500,000
  • Trackers detected but no cookie policy found
    UK GDPR: GBP 10,000 – GBP 17,500,000
  • Trackers detected but no cookie policy found
    PECR: GBP 1,000 – GBP 500,000

+5 more

Bandwidth Waste

£0.62 /mo

9888.2 MB/mo × 0.063 GBP/GB

  • Optimize transfer: save ~989 KB per page load
    Saves £0.62/mo

Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Unique monthly visitors from your analytics

Purchases, signups, or key actions

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue
Current bounce (est.)
After fixes (est.)
Estimated bounce reduction

Fix 3 critical issues to capture this value

How this is calculated

Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.

Your site's LCP: → estimated after fixes.

These are estimates based on industry research — actual results vary

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

Was this report useful?

Thanks for your feedback!

We'll use a cached audit if available, or offer to scan.

Checking for existing audit...

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

32
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
82
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

6.32 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

15.15 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.39 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.003

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

8.48 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

15.31 s

Detailed Report

Audit breakdown by category with detailed findings.

32

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:318.044 source:map[column:26918 line:2 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:50.415 source:map[type:text value:[unattributed]]] map[reflowTime:0.548 source:map[column:49635 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.293 source:map[column:49697 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.299 source:map[column:49765 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:43.427 source:map[column:48923 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.412 source:map[column:50698 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:47.902 source:map[column:82691 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.722 source:map[column:29548 line:25 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:2.873 source:map[column:48945 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:75.437 source:map[column:52095 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:55.092 source:map[column:4444 line:27 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:35.216 source:map[column:52069 line:27 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:55.823 source:map[column:9385 line:27 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:44.18 source:map[column:100895 line:0 type:source-location url:https://cdn-cookieyes.com/client_data/7d1896a33bd53d40c20b3666/banner.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489898-780x650.jpeg134.3 KiB115.5 KiB
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489900-780x650.jpeg117.9 KiB99.1 KiB
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489894-780x650.jpeg102.3 KiB83.6 KiB
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489896-780x650.jpeg79.4 KiB61.3 KiB
div > div.span6 > a > img.ws-lazy div > div.span6 > a > img.ws-lazy
cdn.waterstones.com/images/00509343-561x434.jpeg68.5 KiB57.9 KiB
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00508272-770x513.jpeg74.0 KiB55.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/4721/9781472158352.jpg51.4 KiB48.9 KiB
div > div.span6 > a > img.ws-lazy div > div.span6 > a > img.ws-lazy
cdn.waterstones.com/images/00508474-561x434.jpeg52.5 KiB42.0 KiB
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00507435-770x513.jpeg58.7 KiB41.9 KiB
div > div.span6 > a > img.ws-lazy div > div.span6 > a > img.ws-lazy
cdn.waterstones.com/images/00508787-561x434.jpeg48.9 KiB38.4 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/2418/9780241816264.jpg39.1 KiB36.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/4059/9781405978415.jpg39.1 KiB36.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/2415/9780241517475.jpg39.0 KiB36.4 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v1/large/9780/2418/9780241831144.jpg36.4 KiB33.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/5291/9781529157468.jpg35.6 KiB33.0 KiB
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00509411-770x513.jpeg46.2 KiB33.0 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/9780/2416/9780241684450.jpg34.8 KiB32.2 KiB
Manga, Browse div.grid-images > a > div.feature-image > img
cdn.waterstones.com/images/00494718-400x393.jpeg35.5 KiB29.8 KiB
div > div.span6 > a > img.ws-lazy div > div.span6 > a > img.ws-lazy
cdn.waterstones.com/images/00508528-561x434.jpeg38.1 KiB28.0 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/0083/9780008384210.jpg30.0 KiB27.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/5713/9780571378968.jpg29.7 KiB27.2 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/0087/9780008742768.jpg26.0 KiB23.5 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/8049/9781804941430.jpg24.7 KiB22.4 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/2928/3773/2928377347765.jpg24.7 KiB22.2 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/3996/9781399624046.jpg21.5 KiB19.4 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v3/large/9780/0088/9780008808716.jpg21.5 KiB19.1 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/9781/8052/9781805229674.jpg20.9 KiB18.4 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v1/large/9781/5266/9781526678362.jpg20.4 KiB17.8 KiB
The Books You Always Meant to Read. Browse div.grid-images > a > div.feature-image > img
cdn.waterstones.com/images/00495138-400x393.jpeg19.5 KiB15.2 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/3494/9780349450612.jpg16.0 KiB14.7 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/9781/3994/9781399427210.jpg16.0 KiB13.6 KiB
Everyone's Talking About, Find Out More div.grid-images > a > div.feature-image > img
cdn.waterstones.com/images/00394650-400x393.jpeg17.2 KiB13.4 KiB
Book Deals, 50% Off RRP, Shop Now div.grid-images > a > div.feature-image > img
cdn.waterstones.com/images/00396598-400x393.jpeg16.4 KiB12.7 KiB
a > span > span.plus-pulse-icon > ::after a > span > span.plus-pulse-icon > ::after
static.waterstones.com/11.19.0/img/plus/plus-stamp.png9.2 KiB8.2 KiB
div.image-slider-container > a.image-slider-slide > div > img div.image-slider-container > a.image-slider-slide > div > img
cdn.waterstones.com/images/00444514-200x200.png4.9 KiB4.2 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:344.197 label:Time to first byte subpart:timeToFirstByte] map[duration:43.594 label:Resource load delay subpart:resourceLoadDelay] map[duration:187.932 label:Resource load duration subpart:resourceLoadDuration] map[duration:1940.28 label:Element render delay subpart:elementRenderDelay]]
lhId: page-35-IMG
nodeLabel: div > div.hero-slide > a > img.desktop-hide
path: 4,HTML,2,BODY,7,MAIN,2,DIV,1,DIV,2,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,A,1,IMG
selector: div > div.hero-slide > a > img.desktop-hide
snippet: <img class="desktop-hide tablet-hide mobile-show" srcset=" https://cdn.waterstones.com/images/00509411-420x280.jpeg 420w, …" src="https://cdn.waterstones.com/images/00509411-770x513.jpeg" sizes="100vw" alt="">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-35-IMG
nodeLabel: div > div.hero-slide > a > img.desktop-hide
path: 4,HTML,2,BODY,7,MAIN,2,DIV,1,DIV,2,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,A,1,IMG
selector: div > div.hero-slide > a > img.desktop-hide
snippet: <img class="desktop-hide tablet-hide mobile-show" srcset=" https://cdn.waterstones.com/images/00509411-420x280.jpeg 420w, …" src="https://cdn.waterstones.com/images/00509411-770x513.jpeg" sizes="100vw" alt="">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 854 ms
URLTime Spent
waterstones.com/854 ms
www.waterstones.com/0.0 ms

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 26.5 KiB
URLTransfer SizeEst Savings
static.waterstones.com/11.19.0/css/bundle.css142.6 KiB26.5 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 670 ms 132.7 KiB
URLTransfer SizeEst Savings
static.waterstones.com/11.19.0/css/bundle.css142.3 KiB132.7 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 1.8 s 275.1 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation3.1 s
Style & Layout2.2 s
Other1.8 s
Rendering392 ms
Parse HTML & CSS315 ms
Script Parsing & Compilation235 ms
Garbage Collection59 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages that use WebXR are not currently eligible for back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489894-780x650.jpeg
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489900-780x650.jpeg
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489896-780x650.jpeg
div.swiper-slide > a > div.image-container > img div.swiper-slide > a > div.image-container > img
cdn.waterstones.com/images/00489898-780x650.jpeg
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00508272-770x513.jpeg
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00509411-770x513.jpeg
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00507435-770x513.jpeg
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00508272-770x513.jpeg
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00509411-770x513.jpeg
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00507435-770x513.jpeg
div > div.hero-slide > a > img.desktop-hide div > div.hero-slide > a > img.desktop-hide
cdn.waterstones.com/images/00508272-770x513.jpeg

More information about the performance of your application. These numbers don't directly affect the Performance score.

Layout shift culprits
Optimize DOM size
Modern HTTP
Optimize viewport for mobile
Minify JavaScript
User Timing marks and measures 7 user timings
Avoid long main-thread tasks 20 long tasks found
Network Requests
Network Round Trip Times 40 ms
Server Backend Latencies 110 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 210 ms
Avoid large layout shifts 1 layout shift found
INP breakdown
Avoid non-composited animations
93

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
New Rebecca Yarros. Untitled Empyrean Not Book 4. 29.09.26.Pre-Orde div.hero-banner > div.slick-list > div.slick-track > div.slick-slide

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Go to slide 1 div.hero-banner > ul.slick-dots > li > button
Rebecca Yarros div.info-wrap > div.author-wrap > span.authors > a.text-author
Andy Weir div.info-wrap > div.author-wrap > span.authors > a.text-author
Rebecca Yarros div.info-wrap > div.author-wrap > span.authors > a.text-author
Andy Weir div.info-wrap > div.author-wrap > span.authors > a.text-author
Rebecca Yarros div.info-wrap > div.author-wrap > span.authors > a.text-author
Charlie Mackesy div.info-wrap > div.author-wrap > span.authors > a.text-author
Mel Robbins div.info-wrap > div.author-wrap > span.authors > a.text-author
Jess Kidd div.info-wrap > div.author-wrap > span.authors > a.text-author
Jess Kidd div.info-wrap > div.author-wrap > span.authors > a.text-author
Andy Weir div.info-wrap > div.author-wrap > span.authors > a.text-author
Joe Dunthorne div.info-wrap > div.author-wrap > span.authors > a.text-author
Deborah Levy div.info-wrap > div.author-wrap > span.authors > a.text-author
Katie Kirby div.info-wrap > div.author-wrap > span.authors > a.text-author
Huw Aaron div.info-wrap > div.author-wrap > span.authors > a.text-author
Derek Landy div.info-wrap > div.author-wrap > span.authors > a.text-author
S. F. Williamson div.info-wrap > div.author-wrap > span.authors > a.text-author
Suzanne Collins div.info-wrap > div.author-wrap > span.authors > a.text-author

These items highlight common accessibility best practices.

Interactive controls are keyboard focusable
Interactive elements indicate their purpose and state
The page has a logical tab order
Visual order on the page follows DOM order
User focus is not accidentally trapped in a region
The user's focus is directed to new content added to the page
HTML5 landmark elements are used to improve navigation
Offscreen content is hidden from assistive technology
Custom controls have associated labels
Custom controls have ARIA roles
`[aria-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
`[role]`s have all required `[aria-*]` attributes
`[role]` values are valid
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
Image elements have `[alt]` attributes
Form elements have associated labels
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`button`, `link`, and `menuitem` elements have accessible names
ARIA attributes are used as specified for the element's role
Elements use only permitted ARIA attributes
Background and foreground colors have a sufficient contrast ratio
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
Links have a discernible name
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
No element has a `[tabindex]` value greater than 0
Heading elements appear in a sequentially-descending order
Skip links are focusable.
Document has a main landmark.
Deprecated ARIA roles were not used
Identical links have the same purpose.
Elements with visible text labels have matching accessible names.
`[accesskey]` values are unique
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
ARIA input fields have accessible names
ARIA `meter` elements have accessible names
ARIA `progressbar` elements have accessible names
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[role]`s are contained by their required parent element
Elements with the `role=text` attribute do not have focusable descendents.
ARIA toggle fields have accessible names
ARIA `tooltip` elements have accessible names
ARIA `treeitem` elements have accessible names
The page contains a heading, skip link, or landmark region
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Definition list items are wrapped in `<dl>` elements
ARIA IDs are unique
No form fields have multiple labels
`<frame>` or `<iframe>` elements have a title
`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
Links are distinguishable without relying on color.
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
Select elements have associated label elements.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
`[lang]` attributes have a valid value
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
SharedStorage
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
Fledge

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
Failed to load resource: the server responded with a status of 403 ()
www.waterstones.com/ line 17274, col 0
Manifest fetch from https://www.waterstones.com/manifest/webmanifest failed, code 403
www.waterstones.com/ line 11, col 8753
TurnstileError: [Cloudflare Turnstile] Error: 600010. at v (https://challenges.cloudflare.com/turnstile/v0/api.js:1:10922) at L (https://challenges.cloudflare.com/turnstile/v0/api.js:1:40040) at nrWrapper (https://www.waterstones.com/:12:8712)

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uses HTTPS
Avoids third-party cookies
Allows users to paste into input fields
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Serves images with appropriate resolution
Page has the HTML doctype
Properly defines charset
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Use a strong HSTS policy
Ensure proper origin isolation with COOP
Mitigate DOM-based XSS with Trusted Types
Detected JavaScript libraries
Redirects HTTP traffic to HTTPS
Mitigate clickjacking with XFO or CSP
82

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
div.navs-container > ul.navs > li > a.nav-item-highlights
div.navs-container > ul.navs > li > a.nav-item-fiction
div.navs-container > ul.navs > li > a.nav-item-non-fiction
div.navs-container > ul.navs > li > a.nav-item-children's
div.navs-container > ul.navs > li > a.nav-item-stationery
div.navs-container > ul.navs > li > a.nav-item-games
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-what's
li.subnav > ul.navs > li > a.nav-item-favourite
li.subnav > ul.navs > li > a.nav-item-favourite
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-fiction
li.subnav > ul.navs > li > a.nav-item-crime
li.subnav > ul.navs > li > a.nav-item-science
li.subnav > ul.navs > li > a.nav-item-graphic
li.subnav > ul.navs > li > a.nav-item-teenage
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-art
li.subnav > ul.navs > li > a.nav-item-biography
li.subnav > ul.navs > li > a.nav-item-history
li.subnav > ul.navs > li > a.nav-item-home
li.subnav > ul.navs > li > a.nav-item-nature
li.subnav > ul.navs > li > a.nav-item-smart
li.subnav > ul.navs > li > a.nav-item-spirituality
li.subnav > ul.navs > li > a.nav-item-sport
li.subnav > ul.navs > li > a.nav-item-travel
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-pre-school
li.subnav > ul.navs > li > a.nav-item-children's
li.subnav > ul.navs > li > a.nav-item-teenage
li.subnav > ul.navs > li > a.nav-item-education
li.subnav > ul.navs > li > a.nav-item-hobbies
li.subnav > ul.navs > li > a.nav-item-stationery
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-gifts
li.subnav > ul.navs > li > a.nav-item-children's
li.subnav > ul.navs > li > a.nav-item-stationery
li.subnav > ul.navs > li > a.nav-item-book
li.subnav > ul.navs > li > a.nav-item-arts
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-games
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item

To appear in search results, crawlers need access to your app.

Structured data is valid
Page isn’t blocked from indexing
Document has a `<title>` element
Document has a meta description
Page has successful HTTP status code
Image elements have `[alt]` attributes
Document has a valid `hreflang`
robots.txt is valid
Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

75
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
82
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.41 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.97 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

34 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.223

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.48 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.50 s

Detailed Report

Audit breakdown by category with detailed findings.

75

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.22285700000000003] map[node:map[boundingRect:map[bottom:801 height:196 left:45 right:1305 top:605 width:1260] lhId:page-7-DIV nodeLabel:You Might Be Looking For... Bestsellers New Books Coming Soon Signed Fiction No… path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,0,DIV selector:main.main-container > div#pagesmain > div.row > div.image-slider-component snippet:<div class="image-slider-component"> type:node] score:0.211482 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:5020 height:238 left:145 right:388 top:4781 width:243] lhId:page-11-IMG nodeLabel:Book Deals, 50% Off RRP, Shop Now path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,16,DIV,1,DIV,0,A,0,DIV,0,IMG selector:div.grid-images > a > div.feature-image > img snippet:<img srcset=" https://cdn.waterstones.com/images/00396598-1…" sizes="(max-width: 640px) calc(50vw), (max-width: 102…" src="https://cdn.waterstones.com/images/00396598-280x275.jpeg" alt="Book Deals, 50% Off RRP, Shop Now"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:1265 height:381 left:45 right:1305 top:884 width:1260] lhId:page-1-DIV nodeLabel:Untitled Empyrean (Not Book Four) Untitled Empyrean (Not Book Four) Rebecca Yar… path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,2,DIV selector:main.main-container > div#pagesmain > div.row > div.span12 snippet:<div class="span12"> type:node] score:0.010884 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:570 height:375 left:0 right:1350 top:196 width:1350] lhId:page-0-IMG nodeLabel:div > div.hero-slide > a > img.mobile-hide path:4,HTML,2,BODY,7,MAIN,2,DIV,1,DIV,2,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,A,0,IMG selector:div > div.hero-slide > a > img.mobile-hide snippet:<img class="mobile-hide" srcset=" https://cdn.waterstones.com/images/00509410-420x117.jpeg 420w, …" sizes="100vw" src="https://cdn.waterstones.com/images/00509410-1366x379.jpeg" alt=""> type:node]] map[cause:Web font extra:map[type:url value:https://static.waterstones.com/11.19.0/fonts/sourcesanspro-light-webfont.woff2]] map[cause:Web font extra:map[type:url value:https://static.waterstones.com/11.19.0/fonts/sourcesanspro-regular-webfont.woff2]] map[cause:Web font extra:map[type:url value:https://static.waterstones.com/11.19.0/fonts/sourcesanspro-bold-webfont.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:1234 height:278 left:95 right:263 top:956 width:168] lhId:page-8-DIV nodeLabel:Untitled Empyrean (Not Book Four) Untitled Empyrean (Not Book Four) Rebecca Yar… path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,2,DIV,1,DIV,0,DIV,0,DIV,0,DIV selector:div.swiper > div#swiper-wrapper-15b3989a88e74c6d > div.swiper-slide > div snippet:<div> type:node] score:0.000394 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:1124 height:168 left:95 right:263 top:956 width:168] lhId:page-12-IMG nodeLabel:div.image-wrap > div.image-container > a > img.ws-lazy path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,2,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG selector:div.image-wrap > div.image-container > a > img.ws-lazy snippet:<img class="ws-lazy img-book-jacket ws-loaded" width="156" height="240" src="https://cdn.waterstones.com/bookjackets/large/9780/3494/9780349450612.jpg" data-src="https://cdn.waterstones.com/bookjackets/large/9780/3494/9780349450612.jpg" alt=""> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:1124 height:238 left:888 right:1057 top:886 width:168] lhId:page-9-DIV nodeLabel:The Seriously Epic Holiday of Lottie Brooks path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,2,DIV,1,DIV,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV selector:div.swiper-slide > div > div.image-wrap > div.image-container snippet:<div class="image-container"> type:node] score:6.4e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:1124 height:240 left:499 right:653 top:884 width:155] lhId:page-13-IMG nodeLabel:div.image-wrap > div.image-container > a > img.ws-lazy path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,2,DIV,1,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG selector:div.image-wrap > div.image-container > a > img.ws-lazy snippet:<img class="ws-lazy img-book-jacket ws-loaded" width="156" height="240" src="https://cdn.waterstones.com/bookjackets/large/9781/5291/9781529157468.jpg" data-src="https://cdn.waterstones.com/bookjackets/large/9781/5291/9781529157468.jpg" alt=""> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:864 height:35 left:1216 right:1295 top:829 width:79] lhId:page-6-A nodeLabel:SEE MORE path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,1,HEADER,0,A selector:div#pagesmain > div.row > header.span12 > a.button snippet:<a class="button button-see-more" href="/books/bestsellers"> type:node] score:3.1e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:5020 height:238 left:145 right:388 top:4781 width:243] lhId:page-11-IMG nodeLabel:Book Deals, 50% Off RRP, Shop Now path:4,HTML,2,BODY,7,MAIN,2,DIV,2,DIV,16,DIV,1,DIV,0,A,0,DIV,0,IMG selector:div.grid-images > a > div.feature-image > img snippet:<img srcset=" https://cdn.waterstones.com/images/00396598-1…" sizes="(max-width: 640px) calc(50vw), (max-width: 102…" src="https://cdn.waterstones.com/images/00396598-280x275.jpeg" alt="Book Deals, 50% Off RRP, Shop Now"> type:node]]] type:subitems]]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:198.137 source:map[column:26918 line:2 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:77.404 source:map[column:48923 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.479 source:map[column:49635 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.24 source:map[column:49697 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.238 source:map[column:49765 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.394 source:map[column:50698 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:2.509 source:map[column:82691 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.583 source:map[column:29548 line:25 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:4.575 source:map[column:48945 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:0.494 source:map[column:52095 line:1 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:45.447 source:map[column:4444 line:27 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]] map[reflowTime:65.774 source:map[column:9385 line:27 type:source-location url:https://static.waterstones.com/11.19.0/js/bundle.js urlProvider:network]]]

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: div > div.hero-slide > a > img.mobile-hide
path: 4,HTML,2,BODY,7,MAIN,2,DIV,1,DIV,2,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,A,0,IMG
selector: div > div.hero-slide > a > img.mobile-hide
snippet: <img class="mobile-hide" srcset=" https://cdn.waterstones.com/images/00509410-420x117.jpeg 420w, …" sizes="100vw" src="https://cdn.waterstones.com/images/00509410-1366x379.jpeg" alt="">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/4721/9781472158352.jpg51.4 KiB45.4 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/2418/9780241816264.jpg39.1 KiB33.0 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/4059/9781405978415.jpg39.1 KiB33.0 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/2415/9780241517475.jpg39.0 KiB32.9 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v1/large/9780/2418/9780241831144.jpg36.4 KiB29.9 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/5291/9781529157468.jpg35.6 KiB29.5 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/9780/2416/9780241684450.jpg34.8 KiB28.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/0083/9780008384210.jpg30.0 KiB24.2 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/5713/9780571378968.jpg29.7 KiB23.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/0087/9780008742768.jpg26.0 KiB20.0 KiB
div > div.span6 > a > img.ws-lazy div > div.span6 > a > img.ws-lazy
cdn.waterstones.com/images/00509343-374x289.jpeg37.2 KiB19.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/8049/9781804941430.jpg24.7 KiB19.0 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/2928/3773/2928377347765.jpg24.7 KiB18.6 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9781/3996/9781399624046.jpg21.5 KiB16.5 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v3/large/9780/0088/9780008808716.jpg21.5 KiB15.7 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/9781/8052/9781805229674.jpg20.9 KiB15.1 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v1/large/9781/5266/9781526678362.jpg20.4 KiB14.3 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/bookjackets/large/9780/3494/9780349450612.jpg16.0 KiB13.1 KiB
div > div.span6 > a > img.ws-lazy div > div.span6 > a > img.ws-lazy
cdn.waterstones.com/images/00508474-374x289.jpeg28.0 KiB10.4 KiB
div.image-wrap > div.image-container > a > img.ws-lazy div.image-wrap > div.image-container > a > img.ws-lazy
cdn.waterstones.com/override/v2/large/9781/3994/9781399427210.jpg16.0 KiB10.2 KiB
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00508273-1366x379.jpeg94.4 KiB10.1 KiB
Manga, Browse div.grid-images > a > div.feature-image > img
cdn.waterstones.com/images/00494718-280x275.jpeg20.9 KiB8.4 KiB
a > span > span.plus-pulse-icon > ::after a > span > span.plus-pulse-icon > ::after
static.waterstones.com/11.19.0/img/plus/plus-stamp.png9.2 KiB8.2 KiB
div > div.span6 > a > img.ws-lazy div > div.span6 > a > img.ws-lazy
cdn.waterstones.com/images/00508787-374x289.jpeg24.5 KiB6.9 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 270 ms
URLTime Spent
waterstones.com/270 ms
www.waterstones.com/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
You Might Be Looking For... Bestsellers New Books Coming Soon Signed Fiction No… main.main-container > div#pagesmain > div.row > div.image-slider-component
0.211
Untitled Empyrean (Not Book Four) Untitled Empyrean (Not Book Four) Rebecca Yar… main.main-container > div#pagesmain > div.row > div.span12
0.011
Untitled Empyrean (Not Book Four) Untitled Empyrean (Not Book Four) Rebecca Yar… div.swiper > div#swiper-wrapper-15b3989a88e74c6d > div.swiper-slide > div
0.000
The Seriously Epic Holiday of Lottie Brooks div.swiper-slide > div > div.image-wrap > div.image-container
0.000
SEE MORE div#pagesmain > div.row > header.span12 > a.button
0.000
0.000

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 60 ms 26.4 KiB
URLTransfer SizeEst Savings
static.waterstones.com/11.19.0/css/bundle.css142.3 KiB26.4 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 110 ms 135.4 KiB
URLTransfer SizeEst Savings
static.waterstones.com/11.19.0/css/bundle.css142.3 KiB135.4 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 110 ms 276.1 KiB

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages that use WebXR are not currently eligible for back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00508273-1366x379.jpeg
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00509410-1366x379.jpeg
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00507434-1366x379.jpeg
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00508273-1366x379.jpeg
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00509410-1366x379.jpeg
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00507434-1366x379.jpeg
div > div.hero-slide > a > img.mobile-hide div > div.hero-slide > a > img.mobile-hide
cdn.waterstones.com/images/00508273-1366x379.jpeg

More information about the performance of your application. These numbers don't directly affect the Performance score.

Max Potential First Input Delay 120 ms
Optimize DOM size
LCP breakdown
Modern HTTP
Optimize viewport for mobile
Minify JavaScript
User Timing marks and measures 7 user timings
JavaScript execution time 0.6 s
Minimizes main-thread work 1.9 s
Avoid long main-thread tasks 2 long tasks found
Network Requests
Network Round Trip Times 30 ms
Server Backend Latencies 110 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 190 ms
INP breakdown
Avoid non-composited animations
97

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Go to slide 1 div.hero-banner > ul.slick-dots > li > button
Go to slide 2 div.hero-banner > ul.slick-dots > li.slick-active > button
Go to slide 3 div.hero-banner > ul.slick-dots > li > button

These items highlight common accessibility best practices.

Interactive controls are keyboard focusable
Interactive elements indicate their purpose and state
The page has a logical tab order
Visual order on the page follows DOM order
User focus is not accidentally trapped in a region
The user's focus is directed to new content added to the page
HTML5 landmark elements are used to improve navigation
Offscreen content is hidden from assistive technology
Custom controls have associated labels
Custom controls have ARIA roles
`[aria-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
`[role]`s have all required `[aria-*]` attributes
`[role]` values are valid
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
Image elements have `[alt]` attributes
Form elements have associated labels
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`button`, `link`, and `menuitem` elements have accessible names
ARIA attributes are used as specified for the element's role
`[aria-hidden="true"]` elements do not contain focusable descendents
Elements use only permitted ARIA attributes
Background and foreground colors have a sufficient contrast ratio
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
Links have a discernible name
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
No element has a `[tabindex]` value greater than 0
Heading elements appear in a sequentially-descending order
Skip links are focusable.
Document has a main landmark.
Deprecated ARIA roles were not used
Identical links have the same purpose.
Elements with visible text labels have matching accessible names.
`[accesskey]` values are unique
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
ARIA input fields have accessible names
ARIA `meter` elements have accessible names
ARIA `progressbar` elements have accessible names
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[role]`s are contained by their required parent element
Elements with the `role=text` attribute do not have focusable descendents.
ARIA toggle fields have accessible names
ARIA `tooltip` elements have accessible names
ARIA `treeitem` elements have accessible names
The page contains a heading, skip link, or landmark region
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Definition list items are wrapped in `<dl>` elements
ARIA IDs are unique
No form fields have multiple labels
`<frame>` or `<iframe>` elements have a title
`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
Links are distinguishable without relying on color.
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
Select elements have associated label elements.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
`[lang]` attributes have a valid value
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
SharedStorage
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
Fledge

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
Failed to load resource: the server responded with a status of 403 ()
Failed to load resource: the server responded with a status of 403 ()
www.waterstones.com/ line 13725, col 0
Manifest fetch from https://www.waterstones.com/manifest/webmanifest failed, code 403
Manifest fetch from https://www.waterstones.com/manifest/webmanifest failed, code 403
www.waterstones.com/ line 11, col 8753
TurnstileError: [Cloudflare Turnstile] Error: 600010. at v (https://challenges.cloudflare.com/turnstile/v0/api.js:1:10922) at L (https://challenges.cloudflare.com/turnstile/v0/api.js:1:40040) at nrWrapper (https://www.waterstones.com/:12:8712)

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uses HTTPS
Avoids third-party cookies
Allows users to paste into input fields
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Serves images with appropriate resolution
Page has the HTML doctype
Properly defines charset
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Use a strong HSTS policy
Ensure proper origin isolation with COOP
Mitigate DOM-based XSS with Trusted Types
Detected JavaScript libraries
Redirects HTTP traffic to HTTPS
Mitigate clickjacking with XFO or CSP
82

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
div.navs-container > ul.navs > li > a.nav-item-highlights
div.navs-container > ul.navs > li > a.nav-item-fiction
div.navs-container > ul.navs > li > a.nav-item-non-fiction
div.navs-container > ul.navs > li > a.nav-item-children's
div.navs-container > ul.navs > li > a.nav-item-stationery
div.navs-container > ul.navs > li > a.nav-item-games
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-what's
li.subnav > ul.navs > li > a.nav-item-favourite
li.subnav > ul.navs > li > a.nav-item-favourite
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-fiction
li.subnav > ul.navs > li > a.nav-item-crime
li.subnav > ul.navs > li > a.nav-item-science
li.subnav > ul.navs > li > a.nav-item-graphic
li.subnav > ul.navs > li > a.nav-item-teenage
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-art
li.subnav > ul.navs > li > a.nav-item-biography
li.subnav > ul.navs > li > a.nav-item-history
li.subnav > ul.navs > li > a.nav-item-home
li.subnav > ul.navs > li > a.nav-item-nature
li.subnav > ul.navs > li > a.nav-item-smart
li.subnav > ul.navs > li > a.nav-item-spirituality
li.subnav > ul.navs > li > a.nav-item-sport
li.subnav > ul.navs > li > a.nav-item-travel
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-top
li.subnav > ul.navs > li > a.nav-item-pre-school
li.subnav > ul.navs > li > a.nav-item-children's
li.subnav > ul.navs > li > a.nav-item-teenage
li.subnav > ul.navs > li > a.nav-item-education
li.subnav > ul.navs > li > a.nav-item-hobbies
li.subnav > ul.navs > li > a.nav-item-stationery
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-gifts
li.subnav > ul.navs > li > a.nav-item-children's
li.subnav > ul.navs > li > a.nav-item-stationery
li.subnav > ul.navs > li > a.nav-item-book
li.subnav > ul.navs > li > a.nav-item-arts
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li > a.nav-item-games
li.subnav > ul.navs > li.back > a.nav-item
li.subnav > ul.navs > li.back > a.nav-item

To appear in search results, crawlers need access to your app.

Structured data is valid
Page isn’t blocked from indexing
Document has a `<title>` element
Document has a meta description
Page has successful HTTP status code
Image elements have `[alt]` attributes
Document has a valid `hreflang`
robots.txt is valid
Document has a valid `rel=canonical`

Send Feedback