Lighthouse Mobile
· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.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.
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
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| consent.cookiebot.com/uc.js | 299.0 s | 27.0 KiB |
| /uc.js?cbid=5e052ca0-c111-4ceb-86ce-5397a2b7f70d&implemen... | 299.0 s | 27.0 KiB |
| cdn.bc0a.com/autopilot/f00000000300611/autopilot_sdk.js | 3600.0 s | 24.5 KiB |
| tags.srv.stackadapt.com/events.js | 5.0 s | 7.7 KiB |
| snap.licdn.com/li.lms-analytics/insight.min.js | 86400.0 s | 18.7 KiB |
| extend.vimeocdn.com/ga/168265051.js | 86400.0 s | 5.8 KiB |
| /consentconfig/5e052ca0-c111-4ceb-86ce-5397a2b7f70d/kanta... | 7711.0 s | 2.6 KiB |
| /collect?v=2&fmt=js&pid=4042124&time=1776902131119&url=ht... | 0.0 ms | 692 B |
| extend.vimeocdn.com/ga/168265051.js | 86400.0 s | 78 B |
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
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
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
div.component > div.card > picture > img div.component > div.card > picture > img | www.kantar.com/-/media/project/kantar/global/kantar-converser-article-image.png | 808.9 KiB | 777.8 KiB |
div.component > div.card > picture > img div.component > div.card > picture > img | www.kantar.com/-/media/project/kantar/global/explore-evaluator.png | 589.2 KiB | 563.0 KiB |
yang gong ti bridge in west lake, Hangzhou div.component > div.row > div.col-4 > img | /-/media/project/kantar/global/yang-gong-ti-bridge-in-wes... | 483.9 KiB | 466.0 KiB |
building div.component > div.row > div.col-4 > img | /-/media/project/kantar/global/life-at-kantar--1088571620... | 384.0 KiB | 365.9 KiB |
city div.component > div.row > div.col-4 > img | /-/media/project/kantar/global/kantar-supplier-homepage.j... | 315.5 KiB | 297.4 KiB |
div.component > div.card > picture > img div.component > div.card > picture > img | /-/media/project/kantar/global/articles/images/2026/attit... | 285.7 KiB | 259.4 KiB |
div.component > div.card > picture > img div.component > div.card > picture > img | /-/media/project/kantar/global/kantar-brandz-spain-2026-n... | 273.6 KiB | 247.4 KiB |
div.component > div.card > picture > img div.component > div.card > picture > img | www.kantar.com/-/media/project/kantar/shared/sustainability-in-advertising.jpg | 254.9 KiB | 228.7 KiB |
div.component > div.card > picture > img div.component > div.card > picture > img | www.kantar.com/-/media/project/kantar/global/booking-cover-3.png | 223.4 KiB | 197.2 KiB |
div.aspect-ratio-container > a > picture > img div.aspect-ratio-container > a > picture > img | /-/media/project/kantar/global/helping-new-look-unlock-re... | 205.9 KiB | 183.1 KiB |
div.aspect-ratio-container > a > picture > img div.aspect-ratio-container > a > picture > img | www.kantar.com/-/media/project/kantar/global/tassal-cs.jpg | 204.5 KiB | 181.8 KiB |
div.aspect-ratio-container > a > picture > img div.aspect-ratio-container > a > picture > img | /-/media/project/kantar/global/optimising-kitkats-campaig... | 170.2 KiB | 151.4 KiB |
div.component > div.card > picture > img div.component > div.card > picture > img | /-/media/project/kantar/global/brandz-italy-2026-enel-no1... | 142.7 KiB | 116.4 KiB |
div.component > div.c-hero-transparent > div.c-kicksymbol-hero-wrapper > div.c-hero-bg-img div.component > div.c-hero-transparent > div.c-kicksymbol-hero-wrapper > div.c-hero-bg-img | /-/media/project/kantar/global/kantar-advertising-effecti... | 336.4 KiB | 92.3 KiB |
div.component > div.card > picture > img div.component > div.card > picture > img | /-/media/project/kantar/global/kantar-brandz-netherlands-... | 101.3 KiB | 74.2 KiB |
KMP dashboard div.component > div.row > div.col-4 > img | /-/media/project/kantar/shared/marketplace-helix_1500x100... | 45.4 KiB | 27.3 KiB |
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Duration |
|---|---|---|
| cdn.bc0a.com/autopilot/f00000000300611/autopilot_sdk.js | 24.5 KiB | 1.3 s |
| consent.cookiebot.com/uc.js | 27.0 KiB | 1.2 s |
| /-/media/base-themes/main-theme/styles/optimized-min.css?... | 2.5 KiB | 473 ms |
| /-/media/foundation/theming/kantargrid/kantargrid/styles/... | 2.8 KiB | 172 ms |
| /-/media/themes/kantar/global/kantarmain/styles/optimized... | 206.9 KiB | 2.3 s |
| /-/media/themes/kantar/global/core-libraries/styles/optim... | 20.2 KiB | 925 ms |
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.
Performance issues directly impact user engagement and conversion rates.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| kantar.com/ | 836 ms |
| www.kantar.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.
Performance issues directly impact user engagement and conversion rates.
Diagnostics
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /-/media/themes/kantar/global/kantarmain/styles/optimized... | 206.3 KiB | 194.4 KiB |
| /-/media/themes/kantar/global/core-libraries/styles/optim... | 19.7 KiB | 19.7 KiB |
| 13.5 KiB | 11.6 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /-/media/themes/kantar/global/core-libraries/scripts/opti... | 217.0 KiB | 157.5 KiB |
| www.googletagmanager.com/gtag/destination?id=AW-10778449071&cx=c>m=4e64k1 | 146.0 KiB | 80.1 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-PR5V98Q | 191.0 KiB | 79.0 KiB |
| www.googletagmanager.com/gtag/js?id=AW-10998979353&cx=c>m=4e64k1 | 145.2 KiB | 64.0 KiB |
| /-/media/themes/kantar/global/kantarmain/kantar-search/sc... | 66.0 KiB | 49.1 KiB |
| /-/media/themes/kantar/global/kantarmain/scripts/optimize... | 98.4 KiB | 48.2 KiB |
| /uc.js?cbid=5e052ca0-c111-4ceb-86ce-5397a2b7f70d&implemen... | 26.8 KiB | 26.0 KiB |
| /5e052ca0-c111-4ceb-86ce-5397a2b7f70d/cc.js?renew=false&r... | 113.5 KiB | 25.2 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Total CPU Time | Script Evaluation | Script Parse |
|---|---|---|---|
| www.kantar.com/ | 1.2 s | 198 ms | 4.0 ms |
| consent.cookiebot.com/uc.js | 1.1 s | 687 ms | 25 ms |
| Unattributable | 526 ms | 15 ms | 0.0 ms |
| www.googletagmanager.com/gtm.js?id=GTM-PR5V98Q | 416 ms | 340 ms | 71 ms |
| /-/media/themes/kantar/global/kantarmain/scripts/optimize... | 388 ms | 190 ms | 24 ms |
| www.googletagmanager.com/gtag/js?id=AW-10998979353&cx=c>m=4e64k1 | 197 ms | 163 ms | 33 ms |
| /-/media/themes/kantar/global/core-libraries/scripts/opti... | 175 ms | 113 ms | 41 ms |
| www.googletagmanager.com/gtag/destination?id=AW-10778449071&cx=c>m=4e64k1 | 127 ms | 97 ms | 29 ms |
| /-/media/themes/kantar/global/kantarmain/kantar-search/sc... | 85 ms | 60 ms | 16 ms |
| /5e052ca0-c111-4ceb-86ce-5397a2b7f70d/cc.js?renew=false&r... | 80 ms | 9.1 ms | 42 ms |
| /-/media/themes/kantar/global/kantarmain/styles/optimized... | 59 ms | 0.0 ms | 0.0 ms |
| snap.licdn.com/li.lms-analytics/insight.min.js | 57 ms | 46 ms | 4.0 ms |
| tags.srv.stackadapt.com/events.js | 56 ms | 27 ms | 1.7 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
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 2.1 s |
| Other | 1.0 s |
| Style & Layout | 727 ms |
| Parse HTML & CSS | 395 ms |
| Script Parsing & Compilation | 329 ms |
| Rendering | 102 ms |
| Garbage Collection | 59 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
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| Pages with cache-control:no-store header cannot enter 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 |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
More information about the performance of your application. These numbers don't directly affect the Performance score.
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
Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Intelligence for
Brand Growth
Solutions
Perspectives
About
Global Office
Vivo B… body#body > div#wrapper > footer#footer |
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.
Names and labels
When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.col-2 > div.c-navigation-global__menu > div.c-navigation-global__buttons > button.hamburger div.col-2 > div.c-navigation-global__menu > div.c-navigation-global__buttons > button.hamburger |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.component-content > div.row > div.col-2 > a div.component-content > div.row > div.col-2 > a |
div.component > div.c-hero-transparent > div.c-header-campaign__scroll-arrow > a.js-scroll-arrow div.component > div.c-hero-transparent > div.c-header-campaign__scroll-arrow > a.js-scroll-arrow |
div.component-content > div.carousel__image > div.aspect-ratio-container > a div.component-content > div.carousel__image > div.aspect-ratio-container > a |
div.component-content > div.carousel__image > div.aspect-ratio-container > a div.component-content > div.carousel__image > div.aspect-ratio-container > a |
div.component-content > div.carousel__image > div.aspect-ratio-container > a div.component-content > div.carousel__image > div.aspect-ratio-container > a |
footer#footer > div.component > div.component-content > a footer#footer > div.component > div.component-content > a |
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Perspectives div#wrapper > main#content > div.component > h4 |
Sustainability in advertising: The power of bolder, braver decisions div.component > div.card > div.card-body > h6 |
Blueprint for Brand Growth div.col-4 > div.c-hero-stat-content > div.c-hero-stat-description > h4 |
These are opportunities to improve keyboard navigation in your application.
Best Practices
User Experience
Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.
Performance issues directly impact user engagement and conversion rates.
| URL | Aspect Ratio (Displayed) | Aspect Ratio (Actual) | |
|---|---|---|---|
yang gong ti bridge in west lake, Hangzhou div.component > div.row > div.col-4 > img | /-/media/project/kantar/global/yang-gong-ti-bridge-in-wes... | 412 x 270 (1.53) | 2000 x 1499 (1.33) |
building div.component > div.row > div.col-4 > img | /-/media/project/kantar/global/life-at-kantar--1088571620... | 412 x 270 (1.53) | 1500 x 1000 (1.50) |
city div.component > div.row > div.col-4 > img | /-/media/project/kantar/global/kantar-supplier-homepage.j... | 412 x 270 (1.53) | 1000 x 666 (1.50) |
KMP dashboard div.component > div.row > div.col-4 > img | /-/media/project/kantar/shared/marketplace-helix_1500x100... | 412 x 270 (1.53) | 600 x 450 (1.33) |
ul.c-navigation-global__categories > li.c-navigation-global__category > span.c-navigation-global__category__arrow > img ul.c-navigation-global__categories > li.c-navigation-global__category > span.c-navigation-global__category__arrow > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 15 x 15 (1.00) | 9 x 17 (0.53) |
ul.c-navigation-global__categories > li.c-navigation-global__category > span.c-navigation-global__category__arrow > img ul.c-navigation-global__categories > li.c-navigation-global__category > span.c-navigation-global__category__arrow > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 15 x 15 (1.00) | 9 x 17 (0.53) |
ul.c-navigation-global__categories > li.c-navigation-global__category > span.c-navigation-global__category__arrow > img ul.c-navigation-global__categories > li.c-navigation-global__category > span.c-navigation-global__category__arrow > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 15 x 15 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img li.c-navigation-global_product > span.c-navigation-global__category__arrow > a > img | www.kantar.com/-/media/Themes/Kantar/Global/KantarMain/images/arrow | 12 x 12 (1.00) | 9 x 17 (0.53) |
General
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| AttributionReporting |
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| Link destination | Link Text |
|---|---|
| www.kantar.com/solutions/signal-intelligence | Learn More |
| www.kantar.com/solutions/decision-intelligence | Learn More |
| www.kantar.com/solutions/strategic-intelligence | Learn More |
| www.kantar.com/campaigns/brandz | Read more |
| www.kantar.com/uki/supplier-onboarding-and-risk-assessment | LEARN MORE |
Format your HTML in a way that enables crawlers to better understand your app’s content.