Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

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.

Request	Cache TTL	Transfer Size
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
monitor.tapper.ai/bundle.js	3600.0 s	58.6 KiB
cdn.cookielaw.org/scripttemplates/202409.2.0/otBannerSdk.js	86400.0 s	112.1 KiB
/signals/config/8414369468583073?v=2.9.303&r=stable&domai...	1200.0 s	47.8 KiB
scripts.clarity.ms/0.8.59/clarity.js	86400.0 s	26.2 KiB
cdn.jsdelivr.net/npm/swiper@12/swiper-bundle.min.js	604800.0 s	43.7 KiB
/scripttemplates/otSDKStub.js?did=01929e5b-7e00-754e-a951...	86400.0 s	9.1 KiB
/logos/17085366-506f-43da-a766-9e3dd0b8eb91/018ea9b2-b118...	86400.0 s	5.4 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg	86400.0 s	2.7 KiB
/npm/@segment/analytics-consent-wrapper-onetrust@latest/d...	604800.0 s	10.1 KiB
assets.anytrack.io/7xQe5NISmj2w.js	600.0 s	940 B
assets.anytrack.io/7xQe5NISmj2w.links.js	7200.0 s	541 B
/tr/?id=8414369468583073&ev=PageView&dl=https%3A%2F%2Fwww...	0.0 ms	16 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:285.897 label:Time to first byte subpart:timeToFirstByte] map[duration:2270.367 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-DIV

nodeLabel: ETS would like use cookies and other technologies for a variety of reasons, inc…

path: 1,HTML,1,BODY,26,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV

selector: div.ot-sdk-row > div#onetrust-group-container > div#onetrust-policy > div#onetrust-policy-text

snippet: <div id="onetrust-policy-text">

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.

URL	Transfer Size	Duration
/etc.clientlibs/ets/clientlibs/clientlib-dependencies.lc-...	358.3 KiB	1.8 s
/etc.clientlibs/ets/clientlibs/clientlib-toefl-signup.lc-...	2.3 KiB
/etc.clientlibs/ets/clientlibs/clientlib-marketing.lc-d77...	50.3 KiB	302 ms
/etc.clientlibs/ets/clientlibs/clientlib-marketing.lc-6e7...	262.8 KiB	2.1 s
code.jquery.com/jquery-3.6.0.min.js	30.5 KiB	1.1 s
/npm/@segment/analytics-consent-wrapper-onetrust@latest/d...	10.1 KiB	905 ms
/etc.clientlibs/ets/clientlibs/clientlib-base.lc-0b4212bc...	7.8 KiB
/etc.clientlibs/core/wcm/components/page/v2/page/clientli...	387 B
/etc.clientlibs/ets/clientlibs/clientlib-toefl-signup.lc-...	5.0 KiB

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.

	URL	Resource Size	Est Savings
Discover AI at ETS Learn about our AI vision, principles and solutions - and h… `div.leadGenBreakerModule > div > react-component#k5xz65x > div.c-lead-gen-breaker`	www.ets.org/content/dam/ets-org/Rebrand/Photos/ai-block.png	192.4 KiB	111.1 KiB

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

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

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: 836 ms

URL	Time Spent
ets.org/	836 ms
www.ets.org/	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.

Diagnostics

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 43.2 KiB

URL	Transfer Size	Est Savings
/etc.clientlibs/ets/clientlibs/clientlib-dependencies.lc-...	358.1 KiB	43.2 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

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 5.8 s 1.3 MiB

URL	Transfer Size	Est Savings
/etc.clientlibs/ets/clientlibs/clientlib-dependencies.lc-...	358.1 KiB	282.3 KiB
www.googletagmanager.com/gtag/destination?id=G-LSPK6N3LCN&cx=c&gtm=4e64h1	172.1 KiB	89.9 KiB
www.googletagmanager.com/gtag/destination?id=G-T2TH8KSGFZ&cx=c&gtm=4e64h1	175.1 KiB	89.3 KiB
www.googletagmanager.com/gtag/js?id=G-X4K1GDGMNJ&cx=c&gtm=4e64h1	168.6 KiB	87.5 KiB
/etc.clientlibs/ets/clientlibs/clientlib-dynamic-modules/...	122.4 KiB	84.1 KiB
www.googletagmanager.com/gtag/js?id=AW-819758456&cx=c&gtm=4e64h1	146.7 KiB	80.1 KiB
www.googletagmanager.com/gtag/js?id=AW-961899722&cx=c&gtm=4e64h1	144.2 KiB	79.2 KiB
www.googletagmanager.com/gtag/destination?id=AW-11040439592&cx=c&gtm=4e64h1	137.5 KiB	78.3 KiB
www.googletagmanager.com/gtag/js?id=AW-10977752788&cx=c&gtm=4e64h1	137.9 KiB	77.8 KiB
cdn.cookielaw.org/scripttemplates/202409.2.0/otBannerSdk.js	111.8 KiB	60.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-KPNMN62	209.0 KiB	60.1 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js	109.1 KiB	54.1 KiB
/etc.clientlibs/ets/clientlibs/clientlib-dynamic-modules/...	43.9 KiB	43.6 KiB
cdn.jsdelivr.net/npm/swiper@12/swiper-bundle.min.js	43.6 KiB	42.3 KiB
monitor.tapper.ai/bundle.js	58.3 KiB	41.1 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	31.8 KiB
assets.anytrack.io/scripts/v0/6d3458f.js	72.0 KiB	31.4 KiB
code.jquery.com/jquery-3.6.0.min.js	30.2 KiB	20.7 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.

URL	Total CPU Time	Script Evaluation	Script Parse
Unattributable	1.6 s	276 ms	0.0 ms
www.ets.org/	1.5 s	136 ms	6.5 ms
/etc.clientlibs/ets/clientlibs/clientlib-marketing.lc-d77...	923 ms	734 ms	24 ms
www.googletagmanager.com/gtm.js?id=GTM-KPNMN62	903 ms	752 ms	136 ms
/etc.clientlibs/ets/clientlibs/clientlib-dynamic-modules/...	745 ms	20 ms	14 ms
assets.anytrack.io/scripts/v0/6d3458f.js	578 ms	517 ms	29 ms
cdn.cookielaw.org/scripttemplates/202409.2.0/otBannerSdk.js	550 ms	336 ms	74 ms
scripts.clarity.ms/0.8.59/clarity.js	512 ms	392 ms	13 ms
/etc.clientlibs/ets/clientlibs/clientlib-dependencies.lc-...	494 ms	242 ms	239 ms
www.googletagmanager.com/gtag/destination?id=G-T2TH8KSGFZ&cx=c&gtm=4e64h1	423 ms	265 ms	85 ms
www.googletagmanager.com/gtag/destination?id=G-LSPK6N3LCN&cx=c&gtm=4e64h1	382 ms	275 ms	91 ms
www.googletagmanager.com/gtag/js?id=G-X4K1GDGMNJ&cx=c&gtm=4e64h1	355 ms	263 ms	90 ms
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js	352 ms	261 ms	82 ms
www.ets.org/content/dam/ets-org/target-js/at.js	327 ms	297 ms	21 ms
www.googletagmanager.com/gtag/js?id=AW-961899722&cx=c&gtm=4e64h1	321 ms	258 ms	60 ms
www.googletagmanager.com/gtag/js?id=AW-10977752788&cx=c&gtm=4e64h1	297 ms	216 ms	79 ms
www.googletagmanager.com/gtag/js?id=AW-819758456&cx=c&gtm=4e64h1	270 ms	208 ms	60 ms
www.googletagmanager.com/gtag/destination?id=AW-11040439592&cx=c&gtm=4e64h1	250 ms	186 ms	63 ms
connect.facebook.net/en_US/fbevents.js	250 ms	186 ms	63 ms
/signals/config/8414369468583073?v=2.9.303&r=stable&domai...	226 ms	179 ms	44 ms
analytics.tiktok.com/i18n/pixel/static/identify_5cff1caf.js	145 ms	117 ms	25 ms
monitor.tapper.ai/bundle.js	113 ms	80 ms	31 ms
/etc.clientlibs/ets/clientlibs/clientlib-dynamic-modules/...	60 ms	39 ms	21 ms
/etc.clientlibs/ets/clientlibs/clientlib-base.lc-3b350d0e...	59 ms	44 ms	12 ms
/etc.clientlibs/ets/clientlibs/clientlib-dynamic-modules/...	52 ms	49 ms	2.0 ms
code.jquery.com/jquery-3.6.0.min.js	52 ms	35 ms	14 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.

Category	Time Spent
Script Evaluation	6.9 s
Other	2.4 s
Script Parsing & Compilation	1.5 s
Style & Layout	795 ms
Garbage Collection	337 ms
Parse HTML & CSS	317 ms
Rendering	206 ms

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: 0.0 ms 30.0 KiB

URL	Transfer Size	Est Savings
	20.6 KiB	17.9 KiB
/! Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com * License - https://font…	12.0 KiB	12.0 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
www.ets.org/content/dam/ets-org/home/videos/illustration-of-ai-future.mp4	439.0 KiB
/etc.clientlibs/ets/clientlibs/clientlib-dependencies.lc-...	358.3 KiB
/etc.clientlibs/ets/clientlibs/clientlib-marketing.lc-6e7...	262.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-KPNMN62	209.3 KiB
www.ets.org/content/dam/ets-org/Rebrand/Photos/ai-block.png	192.7 KiB
www.googletagmanager.com/gtag/destination?id=G-T2TH8KSGFZ&cx=c&gtm=4e64h1	175.1 KiB
www.googletagmanager.com/gtag/destination?id=G-LSPK6N3LCN&cx=c&gtm=4e64h1	172.2 KiB
www.googletagmanager.com/gtag/js?id=G-X4K1GDGMNJ&cx=c&gtm=4e64h1	168.6 KiB
www.googletagmanager.com/gtag/js?id=AW-819758456&cx=c&gtm=4e64h1	146.7 KiB
www.googletagmanager.com/gtag/js?id=AW-961899722&cx=c&gtm=4e64h1	144.2 KiB

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.image-card-slider__card > div.image-card-slider__card-poster > div.image-card-slider__img-card > img `div.image-card-slider__card > div.image-card-slider__card-poster > div.image-card-slider__img-card > img`	/content/dam/ets-org/corporate/amit-sevak.png/jcr:content...
A young woman is seated in a chair with an open book. She has paused in her rea… `li.c-product-pathing__card-container > div.c-product-pathing-card > div.c-product-pathing-card__image-wrapper > img.c-product-pathing-card__image`	/content/dam/ets-org/Rebrand/Photos/home-toefl-img.jpg/jc...
A teacher stands at the front of her classroom, gesturing with a dry erase mark… `li.c-product-pathing__card-container > div.c-product-pathing-card > div.c-product-pathing-card__image-wrapper > img.c-product-pathing-card__image`	/content/dam/ets-org/Rebrand/Photos/home-praxis-img.jpg/j...
A Black woman is using a tablet screen to assist her colleague, who listens tho… `li.c-product-pathing__card-container > div.c-product-pathing-card > div.c-product-pathing-card__image-wrapper > img.c-product-pathing-card__image`	/content/dam/ets-org/Rebrand/Photos/mature-male-tablet-wi...
A professionally-dressed woman listens attentively to a speaker out of frame. `li.c-product-pathing__card-container > div.c-product-pathing-card > div.c-product-pathing-card__image-wrapper > img.c-product-pathing-card__image`	/content/dam/ets-org/Rebrand/Photos/home-gre-img.jpg/jcr:...
A woman wearing glasses is writing in a notebook, seated next to a man who is t… `div.c-recirculation__card-container > div.c-recirculation-card > div.c-recirculation-card__image-wrapper > img.c-recirculation-card__primary-image`	/content/dam/ets-org/Rebrand/Photos/young-diverse-student...
A young woman in a hijba is writing on a piece of paper with a pen. `div.c-recirculation__card-container > div.c-recirculation-card > div.c-recirculation-card__image-wrapper > img.c-recirculation-card__primary-image`	/content/dam/ets-org/Rebrand/Photos/young-muslim-woman-wo...
A close-up of a person holding a tablet with a large plant in the background. `div.c-recirculation__card-container > div.c-recirculation-card > div.c-recirculation-card__image-wrapper > img.c-recirculation-card__primary-image`	/content/dam/ets-org/Rebrand/Photos/GettyImages-178987250...
A smiling young man is reading a reference book in a library. `li > div.c-teaser-card > div.c-teaser-card__image-container > img.c-teaser-card__image`	/content/dam/ets-org/Rebrand/Photos/side-view-smiling-whi...
Three colleagues in a range of ages, genders, and races are seated closely behi… `li > div.c-teaser-card > div.c-teaser-card__image-container > img.c-teaser-card__image`	/content/dam/ets-org/Rebrand/Photos/three-people-around-l...
A group of researchers in a range of ages, genders, and races are having a disc… `li > div.c-teaser-card > div.c-teaser-card__image-container > img.c-teaser-card__image`	/content/dam/ets-org/Rebrand/Photos/business-meeting-mode...
A Black executive wearing a suit attends a meeting with his colleagues in a bri… `li > div.c-teaser-card > div.c-teaser-card__image-container > img.c-teaser-card__image`	/content/dam/ets-org/Rebrand/Photos/black-businessman-han...
A group of colleagues in a range of races, genders, and ages are having a strat… `li > div.c-teaser-card > div.c-teaser-card__image-container > img.c-teaser-card__image`	/content/dam/ets-org/Rebrand/Photos/strategy-team-meeting...
Two smiling women are looking at an image on a tablet in a large conference roo… `li > div.c-teaser-card > div.c-teaser-card__image-container > img.c-teaser-card__image`	/content/dam/ets-org/Rebrand/Photos/black-and-indian-wome...

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

●Optimize viewport for mobile

●Minify CSS

●Avoid long main-thread tasks 20 long tasks found

●Avoid non-composited animations 2 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 80 ms

●Server Backend Latencies 120 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 10 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid large layout shifts

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.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
nav.c-global-nav__container > ul.c-global-nav__container-list > li.c-global-nav__right-item > a.c-global-nav__register-item `nav.c-global-nav__container > ul.c-global-nav__container-list > li.c-global-nav__right-item > a.c-global-nav__register-item`

These are opportunities to improve the semantics of the controls in your application. This 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
Legal `div.c-global-footer__utility-nav > ul > li > a`
Privacy & Security `div.c-global-footer__utility-nav > ul > li > a`
ETS Trademarks `div.c-global-footer__utility-nav > ul > li > a`
Consumer Health Data Privacy Policy `div.c-global-footer__utility-nav > ul > li > a`
Title VI Compliance Statement `div.c-global-footer__utility-nav > ul > li > a`
Cookies Settings `div.c-global-footer__utility-nav > ul > li > button#ot-sdk-btn`

These items highlight common accessibility best practices.

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
LEARN ABOUT AI AT ETS `div.c-lead-gen-breaker > div.c-lead-gen-breaker__content > div.c-lead-gen-breaker__action > a.e-cta`

○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

●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

●`[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

●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

●`[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 are distinguishable without relying on color.

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[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

○Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○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.

○`<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.

○Identical links have the same purpose.

○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.

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 / Warning	Source
AttributionReporting	connect.facebook.net/en_US/fbevents.js line 279, col 769

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.

URL	Map URL
/etc.clientlibs/ets/clientlibs/clientlib-dependencies.lc-...	www.ets.org/etc.clientlibs/ets/clientlibs/chance.min.js.map
cdn.jsdelivr.net/npm/swiper@12/swiper-bundle.min.js	cdn.jsdelivr.net/npm/swiper@12/swiper-bundle.min.js.map
/npm/@segment/analytics-consent-wrapper-onetrust@latest/d...	/npm/@segment/analytics-consent-wrapper-onetrust@latest/d...

●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 browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

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

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
www.ets.org/ai.html	LEARN MORE
www.ets.org/ceo-corner.html	READ MORE

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

○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 are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`