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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

30

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

Performance issues directly impact user engagement and conversion rates.

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.

RequestCache TTLTransfer Size
www.datacamp.com/_next/static/chunks/pages/_app-f7e9c71fee037706.js3600.0 s622.5 KiB
media.datacamp.com/cms/eng-8f1435.png0.0 ms74.2 KiB
www.datacamp.com/_next/static/chunks/63998-952e986f3af7d60d.js3600.0 s76.0 KiB
www.datacamp.com/_next/static/chunks/framework-14a02dd5e036ebf0.js3600.0 s58.2 KiB
www.datacamp.com/_next/static/chunks/pages/index-b2b0756740fcb913.js3600.0 s38.7 KiB
www.datacamp.com/_next/static/chunks/main-028a31fb8f3df20b.js3600.0 s36.6 KiB
media.datacamp.com/cms/state-of-data--ai-literacy-2026-cover-thumbnail.png?w=6400.0 ms24.4 KiB
d.impactradius-event.com/A2717580-78fa-4df3-ac44-faf7e7c3a6e91.js900.0 s20.6 KiB
www.datacamp.com/_next/static/chunks/45981-39cfa9cd4b703f9f.js3600.0 s22.0 KiB
www.datacamp.com/_next/static/chunks/21809-cfb784d0373a0369.js3600.0 s20.0 KiB
media.datacamp.com/cms/photo-personas-one.webp?w=7500.0 ms16.0 KiB
cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=151607259200.0 s68.6 KiB
www.datacamp.com/_next/static/chunks/webpack-597685773c802e07.js3600.0 s16.9 KiB
cdn.requestmetrics.com/agent/current/rm.js1200.0 s14.7 KiB
www.datacamp.com/_next/static/chunks/74001.8cb618053d42a883.js3600.0 s11.9 KiB
www.datacamp.com/_next/static/chunks/85832.e33c238b73916a2b.js3600.0 s9.2 KiB
media.datacamp.com/cms/bg-data-literacy-report-2025.svg0.0 ms7.0 KiB
www.datacamp.com/_next/static/chunks/41089-518016dbcc4e8fa3.js3600.0 s8.5 KiB
public.profitwell.com/js/profitwell.js?auth=7041278c644eba1df6181e0425efa58314400.0 s9.7 KiB
www.datacamp.com/_next/static/chunks/15476-3abc79d3bd85c0c1.js3600.0 s8.0 KiB
www.datacamp.com/_next/static/chunks/53776-2a800a410e6e67ad.js3600.0 s7.1 KiB
media.datacamp.com/cms/bg-personas-three.webp0.0 ms5.3 KiB
media.datacamp.com/cms/bg-personas-one.webp0.0 ms5.0 KiB
campaign-service.datacamp.com/api/v1/banner?locale=en0.0 ms4.7 KiB
www.datacamp.com/_next/static/chunks/59922-ca82e2055a0b9a33.js3600.0 s5.5 KiB
www.datacamp.com/_next/static/VCN6wdJ4f36TAEfaV2Flz/_buildManifest.js3600.0 s5.4 KiB
www.datacamp.com/_next/static/chunks/41009-1db07340cf2d732f.js3600.0 s5.0 KiB
dcmfe.datacamp.com/assets/fonts/StudioFeixenSansRegular-english-v2.woff2360000.0 s19.2 KiB
www.datacamp.com/_next/static/chunks/85756-62745a2b54657720.js3600.0 s4.0 KiB
www.datacamp.com/_next/static/chunks/6943-8fa4afffd90dea16.js3600.0 s3.7 KiB
www.datacamp.com/_next/static/chunks/19292.251e7a88e14c7a13.js3600.0 s2.7 KiB
www.datacamp.com/_next/static/chunks/72815.978bf9cfc27095eb.js3600.0 s2.7 KiB
www.datacamp.com/_next/static/chunks/46197-ad95baae7b5cafdc.js3600.0 s2.6 KiB
www.datacamp.com/_next/static/chunks/85028-b2d851d3d5d84199.js3600.0 s2.3 KiB
www.datacamp.com/_next/static/chunks/37676-e033494bd108e2c0.js3600.0 s2.3 KiB
www.datacamp.com/_next/static/chunks/17784.7028fd996433677e.js3600.0 s2.2 KiB
www.datacamp.com/_next/static/chunks/44182.c3e3c9a20f942697.js3600.0 s2.2 KiB
www.datacamp.com/_next/static/chunks/63804.269942c655c478de.js3600.0 s2.1 KiB
www.datacamp.com/_next/static/chunks/75721.c01a1074b9e59562.js3600.0 s2.1 KiB
www.datacamp.com/_next/static/chunks/30022.fd325773a68ab749.js3600.0 s2.0 KiB
www.datacamp.com/_next/static/chunks/75464.4d45db0b6d3d612a.js3600.0 s1.8 KiB
dcmfe.datacamp.com/assets/fonts/StudioFeixenSansRegular-latin-v2.woff2360000.0 s8.5 KiB
www.datacamp.com/_next/static/chunks/78956.e85605bee025aa1d.js3600.0 s1.8 KiB
www.datacamp.com/_next/static/chunks/89128.baec5a545bcebd08.js3600.0 s1.6 KiB
www.datacamp.com/_next/static/chunks/17945.d5636c261fd02a3f.js3600.0 s1.6 KiB
www.datacamp.com/_next/static/chunks/40129.22017ef9c6a16b09.js3600.0 s1.5 KiB
www.datacamp.com/_next/static/chunks/10648-dcd65c77d31f246e.js3600.0 s1.4 KiB
www.datacamp.com/_next/static/chunks/8096.6b111d24c44adbac.js3600.0 s1.3 KiB
www.datacamp.com/_next/static/css/524465260040063c.css3600.0 s1.3 KiB
www.datacamp.com/_next/static/chunks/72852.9602ed9892df93f9.js3600.0 s1.3 KiB
www.datacamp.com/_next/static/chunks/86589.c2d18562d0900061.js3600.0 s1.2 KiB
www.datacamp.com/_next/static/chunks/63619.179a12bed81cbd31.js3600.0 s1.1 KiB
www.datacamp.com/_next/static/chunks/7798-2575efc464a9996d.js3600.0 s1.1 KiB
www.datacamp.com/_next/static/chunks/47416-e2aefba008e9f696.js3600.0 s1.1 KiB
www.datacamp.com/_next/static/chunks/74046.92d7a659a5334c20.js3600.0 s1.0 KiB
www.datacamp.com/_next/static/chunks/71900-11044b1fcc22ae9a.js3600.0 s1.0 KiB
media.datacamp.com/cms/banner-bg.svg0.0 ms845 B
cdn.onesignal.com/sdks/OneSignalSDK.js259200.0 s3.6 KiB
www.datacamp.com/_next/static/VCN6wdJ4f36TAEfaV2Flz/_ssgManifest.js3600.0 s373 B

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.

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:381.322 label:Time to first byte subpart:timeToFirstByte] map[duration:2178.284 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-P
nodeLabel: Master in-demand skills in Python, ChatGPT, Power BI, and more through interact…
path: 1,HTML,1,BODY,3,DIV,4,DIV,0,MAIN,0,HEADER,0,DIV,0,DIV,0,ARTICLE,1,P
selector: div.css-hqeszv > div.css-1m8fnv3 > article.css-dshk2k > p.css-fz9ijt
snippet: <p data-waffles-component="paragraph" class="css-fz9ijt">

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
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
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

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
Promo | 50% Off a.dc-ps-banner > div.dc-ps-banner-flex > div.img-left-container > img.img-left
media.datacamp.com/cms/eng-8f1435.png73.6 KiB73.0 KiB
Illustration of The 2026 State of Data & AI Literacy Report div.css-lhzt > div.css-1iryv4q > a.css-1c4u186 > img
media.datacamp.com/cms/state-of-data--ai-literacy-2026-cover-thumbnail.png?w=64024.0 KiB20.8 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: 799 ms
URLTime Spent
datacamp.com/799 ms
www.datacamp.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

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

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 2.4 s 482.0 KiB
URLTransfer SizeEst Savings
www.datacamp.com/_next/static/chunks/pages/_app-f7e9c71fee037706.js581.5 KiB199.4 KiB
accounts.google.com/gsi/client95.6 KiB68.9 KiB
www.googletagmanager.com/gtag/js?id=G-0VFSSYW4KG&cx=c&gtm=4e64k0166.5 KiB64.3 KiB
/gtm.js?id=GTM-TGGWB2P&gtm_auth=z30B2gnFx7YaJZsA-wGD8A&gt...176.7 KiB60.1 KiB
cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160768.1 KiB59.8 KiB
www.datacamp.com/_next/static/chunks/framework-14a02dd5e036ebf0.js58.1 KiB29.5 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.

URLTotal CPU TimeScript EvaluationScript Parse
www.datacamp.com/_next/static/chunks/framework-14a02dd5e036ebf0.js1.8 s1.6 s30 ms
www.datacamp.com/1.6 s8.5 ms0.7 ms
www.datacamp.com/_next/static/chunks/pages/_app-f7e9c71fee037706.js1.0 s698 ms274 ms
Unattributable619 ms23 ms0.0 ms
/gtm.js?id=GTM-TGGWB2P&gtm_auth=z30B2gnFx7YaJZsA-wGD8A&gt...452 ms387 ms47 ms
www.googletagmanager.com/gtag/js?id=G-0VFSSYW4KG&cx=c&gtm=4e64k0330 ms288 ms39 ms
www.datacamp.com/_next/static/chunks/pages/index-b2b0756740fcb913.js251 ms240 ms10 ms
www.datacamp.com/_next/static/chunks/main-028a31fb8f3df20b.js121 ms104 ms16 ms
d.impactradius-event.com/A2717580-78fa-4df3-ac44-faf7e7c3a6e91.js97 ms91 ms4.0 ms
www.datacamp.com/_next/static/chunks/63998-952e986f3af7d60d.js74 ms1.4 ms72 ms
cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160753 ms24 ms28 ms

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 Evaluation3.6 s
Other1.1 s
Script Parsing & Compilation610 ms
Style & Layout569 ms
Rendering562 ms
Garbage Collection146 ms
Parse HTML & CSS134 ms

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

●Layout shift culprits
●Optimize DOM size
●Font display
●Forced reflow
●Modern HTTP
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●Avoids enormous network payloads Total size was 1,914 KiB
●User Timing marks and measures 10 user timings
●Avoid long main-thread tasks 16 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 60 ms
●Server Backend Latencies 150 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 280 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
95

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
By continuing, you accept our div.css-1m8fnv3 > div.css-154eoqi > small.css-oo3484 > span
, our div.css-1m8fnv3 > div.css-154eoqi > small.css-oo3484 > span
and that your data is stored in the USA. div.css-1m8fnv3 > div.css-154eoqi > small.css-oo3484 > span
By continuing, you accept our div.css-9vu0wg > div.css-154eoqi > small.css-oo3484 > span
, our div.css-9vu0wg > div.css-154eoqi > small.css-oo3484 > span
and that your data is stored in the USA. div.css-9vu0wg > div.css-154eoqi > small.css-oo3484 > span

These are opportunities to improve the legibility of your content.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
I'm switching careers div.css-1ncc8vm > article.css-14p9gc3 > div.css-1yey8ty > h5.css-6mplrj

These are opportunities to improve keyboard navigation in your application.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
EN div.css-1xsfkq7 > div.css-widde5 > div.css-zzhzkg > button#dropdown-trigger-:R2cqlqkqtadm:
○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.
●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
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●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
●Touch targets have sufficient size and spacing.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○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
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○No element has a `[tabindex]` value greater than 0
○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.
96

Best Practices

General

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
www.datacamp.com/_next/static/chunks/framework-14a02dd5e036ebf0.js
Error: <mask> attribute height: Expected length, "auto".
www.datacamp.com/_next/static/chunks/framework-14a02dd5e036ebf0.js
Error: <svg> attribute height: Expected length, "auto".
www.datacamp.com/api/users/signed_in.json
Failed to load resource: the server responded with a status of 401 ()
www.datacamp.com/
Not signed in with the identity provider.

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.

URLMap URL
www.datacamp.com/_next/static/chunks/pages/_app-f7e9c71fee037706.js
www.datacamp.com/_next/static/chunks/63998-952e986f3af7d60d.js
cdn.requestmetrics.com/agent/current/rm.jscdn.requestmetrics.com/agent/current/rm.js.map
cdn.onesignal.com/sdks/OneSignalSDK.jscdn.onesignal.com/sdks/OneSignalSDK.js.map
cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=151607cdn.onesignal.com/sdks/OneSignalPageSDKES6.js.map
●Uses HTTPS
●Avoids deprecated APIs
●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
100

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.

○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
●Links have descriptive text
●Links are crawlable
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○robots.txt is valid

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