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
/pagead/managed/js/adsense/m202607080101/show_ads_impl_fy...	1209600.0 s	165.6 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
www.coobiz.it/images/photos/photo_197445/image-ubs1783751919.png	1728000.0 s	88.5 KiB
/style/icons/font-awesome-4.7.0/fonts/fontawesome-webfont...	1728000.0 s	75.5 KiB
www.coobiz.it/images/products/product_291/image-ubs1656359177.png	1728000.0 s	74.6 KiB
www.coobiz.it/style/components.css	1728000.0 s	57.0 KiB
www.coobiz.it/images/products/product_198/image-ubs1647120412.jpg	1728000.0 s	27.7 KiB
www.coobiz.it/scripts/select2.min.js	1728000.0 s	20.8 KiB
www.coobiz.it/style/images/icons.png	1728000.0 s	20.4 KiB
www.coobiz.it/style/coobiz_new.css	1728000.0 s	19.9 KiB
www.coobiz.it/style/bootstrap.css	1728000.0 s	18.8 KiB
www.coobiz.it/style/core.css	1728000.0 s	17.6 KiB
www.coobiz.it/images/posts/post_7369/image-ubs1783495416.png	1728000.0 s	16.0 KiB
www.coobiz.it/scripts/coobiz_new.js	1728000.0 s	12.9 KiB
www.coobiz.it/scripts/bootstrap.min.js	1728000.0 s	9.7 KiB
www.coobiz.it/style/icons/font-awesome-4.7.0/css/font-awesome.min.css	1728000.0 s	6.9 KiB
www.coobiz.it/style/colors.css	1728000.0 s	5.7 KiB
www.coobiz.it/scripts/uniform.min.js	1728000.0 s	3.0 KiB
/images/companies/company_1394157561/image-smallmedium178...	1728000.0 s	2.3 KiB
www.coobiz.it/styles/images/coobiz/logo.png	1728000.0 s	2.3 KiB
/images/companies/company_1394157556/image-smallmedium178...	1728000.0 s	1.6 KiB
www.coobiz.it/scripts/coobiz-mobile.js	1728000.0 s	1.2 KiB
/images/companies/company_1394156082/image-smallmedium165...	1728000.0 s	1.2 KiB
www.coobiz.it/styles/images/coobiz/user_no_image/social.gif	1728000.0 s	1.1 KiB
www.coobiz.it/scripts/coobiz/home_page.js	1728000.0 s	979 B
www.coobiz.it/styles/jquery/nyromodal/nyromodal.css	1728000.0 s	914 B
/images/companies/company_1394153312/image-smallmedium168...	1728000.0 s	503 B
/images/companies/company_1394155720/image-smallmedium163...	1728000.0 s	434 B

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:0.7699490387979844] map[node:map[boundingRect:map[bottom:1699 height:1629 left:0 right:412 top:70 width:412] lhId:page-1-DIV nodeLabel:Ti diamo il benvenuto nella tua business community Registra la tua azienda gra… path:1,HTML,1,BODY,2,DIV,1,DIV,4,DIV,0,DIV,0,DIV selector:div.page-content > div.content-wrapper > div.row > div.col-lg-8 snippet:<div class="col-lg-8 col-md-12"> type:node] score:0.7699490387979844 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2]]] 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.

URL	Est Savings
/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu...	35 ms
/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DP...	30 ms

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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:52.809 source:map[column:449 line:30 type:source-location url:/_/mss/boq-content-ads-contributor/_/js/k=boq-content-ads-contributor.ContributorServingResponseClientJs.en_US.SZiIDxM8k14.es5.O/d=1/exm=kernel_loader,loader_js_executable/ed=1/rs=AJlcJMyjHSPbQgI7Q6pBPA_l2Pd7Ui7OvA/m=web_iab_tcf_v2_wall_executable 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: Trovalo - Edison - T-Shirt bianca Uomo | Liula

path: 1,HTML,1,BODY,2,DIV,1,DIV,4,DIV,0,DIV,0,DIV,2,DIV,1,DIV,1,DIV,0,DIV,0,UL,0,LI,1,DIV,0,DIV,0,DIV,6,DIV,0,DIV,1,DIV,0,A,0,IMG

selector: div.productContent > div.productImage > a > img

snippet: <img loading="lazy" src="https://www.coobiz.it/images/products/product_198/image-ubs1647120412.jpg" alt="Trovalo - Edison - T-Shirt bianca Uomo | Liula">

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

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
www.coobiz.it/styles/jquery/nyromodal/nyromodal.css	914 B
www.coobiz.it/style/coobiz_new.css	19.9 KiB	452 ms
www.coobiz.it/style/bootstrap.css	18.8 KiB	452 ms
www.coobiz.it/style/icons/font-awesome-4.7.0/css/font-awesome.min.css	6.9 KiB	151 ms

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
Trovalo - Edison - T-Shirt bianca Uomo \| Liula `div.productContent > div.productImage > a > img`	www.coobiz.it/images/products/product_198/image-ubs1647120412.jpg	27.6 KiB	16.5 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: 838 ms

URL	Time Spent
coobiz.it/	838 ms
www.coobiz.it/	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.

Element	Layout shift score
Ti diamo il benvenuto nella tua business community Registra la tua azienda gra… `div.page-content > div.content-wrapper > div.row > div.col-lg-8`	0.770

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

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

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: 520 ms 123.4 KiB

URL	Transfer Size	Est Savings
www.coobiz.it/style/components.css	56.9 KiB	56.6 KiB
www.coobiz.it/style/coobiz_new.css	19.8 KiB	18.3 KiB
www.coobiz.it/style/bootstrap.css	18.8 KiB	17.6 KiB
www.coobiz.it/style/core.css	17.5 KiB	16.9 KiB
.fc-consent-root .fc-dialog-container.fc-landscape-mode { height: 90% !important; … } …	16.3 KiB	14.1 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: 1.9 s 269.3 KiB

URL	Transfer Size	Est Savings
/pagead/managed/js/adsense/m202607080101/show_ads_impl_fy...	165.6 KiB	136.8 KiB
www.googletagmanager.com/gtag/js?id=G-8MXMGKC5CV	173.1 KiB	71.4 KiB
/i/ca-pub-2104548737711576?href=https%3A%2F%2Fwww.coobiz....	69.2 KiB	35.6 KiB
pagead2.googlesyndication.com/pagead/js/adsbygoogle.js	55.0 KiB	25.4 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
www.coobiz.it/	753 ms	18 ms	2.3 ms
/f/AGSKWxUsEk-6mLU84vj2HgRXhXDPyxwh86lDrjWINgJXEXj3LcYErY...	487 ms	165 ms	44 ms
www.googletagmanager.com/gtag/js?id=G-8MXMGKC5CV	360 ms	298 ms	59 ms
Unattributable	232 ms	7.7 ms	0.0 ms
/i/ca-pub-2104548737711576?href=https%3A%2F%2Fwww.coobiz....	223 ms	198 ms	22 ms
/pagead/managed/js/adsense/m202607080101/show_ads_impl_fy...	183 ms	137 ms	44 ms
pagead2.googlesyndication.com/pagead/js/adsbygoogle.js	161 ms	118 ms	17 ms
ajax.googleapis.com/ajax/libs/jquery/3.6.1/jquery.min.js	154 ms	119 ms	9.1 ms
www.google-analytics.com/analytics.js	59 ms	48 ms	5.7 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	1.1 s
Style & Layout	863 ms
Other	360 ms
Script Parsing & Compilation	223 ms
Parse HTML & CSS	167 ms
Rendering	44 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 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

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: 0.0 ms 3.5 KiB

URL	Transfer Size	Est Savings
www.coobiz.it/scripts/coobiz_new.js	12.8 KiB	3.5 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
Trovalo - Edison - T-Shirt bianca Uomo \| Liula `div.productContent > div.productImage > a > img`	www.coobiz.it/images/products/product_198/image-ubs1647120412.jpg
SCIROPPO GASTRO SNAIL GAST ALLA BAVA DI LUMACA 150ml `div.productContent > div.productImage > a > img`	www.coobiz.it/images/products/product_291/image-ubs1656359177.png
Il furto di file dal Comune di Casalnuovo analizzato da BOR `div.streamUnitContent > div.postLink > div.postImage > img`	www.coobiz.it/images/posts/post_7369/image-ubs1783495416.png

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

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Avoids enormous network payloads Total size was 1,290 KiB

●Avoid long main-thread tasks 12 long tasks found

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 30 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 140 ms

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

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
gratuitamente `div.panel-body > div.descriptionText > p > a`
Liula `div.media-body > div.rightContent > div > a.companyUri`
un nuovo prodotto/servizio `div.media-body > div.rightContent > div > a`
12 mar `div.rightContent > div > span.media-annotation > span`
leggi tutto `div.streamUnitContent > div.productContent > p > a.readMore`
Mi piace `div.streamUnitFooter > div.col-md-5 > span.likeButton > a.like`
Altro `div.col-md-7 > ul.icons-list > li.dropdown > a.dropdown-toggle`
Azienda Agricola Prada `div.media-body > div.rightContent > div > a.companyUri`
un nuovo prodotto/servizio `div.media-body > div.rightContent > div > a`
27 giu `div.rightContent > div > span.media-annotation > span`
Leggi oltre `div.col-lg-8 > div.contentContainer > p.read-more > a.read-more-btn`
Installazione di Impianti a Torino `div.widgetTop > ul > li > a`
Costruzione di Edifici a Bologna `div.widgetTop > ul > li > a`
Bar e ristorazione a Udine `div.widgetTop > ul > li > a`
Agenzie di viaggio a Roma `div.widgetTop > ul > li > a`
Servizi di Pulizia a Genova `div.widgetTop > ul > li > a`
Intermediazione Abitazioni a Milano `div.widgetTop > ul > li > a`
Consulenza software a Modena `div.widgetTop > ul > li > a`
Agricoltura `div.widgetTop > ul.cloud > li > a`
Alimenti `div.widgetTop > ul.cloud > li > a`
Associazioni `div.widgetTop > ul.cloud > li > a`
Banche e assicurazioni `div.widgetTop > ul.cloud > li > a`
Bellezza e Salute `div.widgetTop > ul.cloud > li > a`
Cartotecnica `div.widgetTop > ul.cloud > li > a`
Casa `div.widgetTop > ul.cloud > li > a`
Chimica e Minerali `div.widgetTop > ul.cloud > li > a`
Ecologia e Energia `div.widgetTop > ul.cloud > li > a`
Edilizia e Impianti `div.widgetTop > ul.cloud > li > a`
Editoria `div.widgetTop > ul.cloud > li > a`
Elettronica `div.widgetTop > ul.cloud > li > a`
Enti pubblici `div.widgetTop > ul.cloud > li > a`
Forniture per Aziende `div.widgetTop > ul.cloud > li > a`
Informatica `div.widgetTop > ul.cloud > li > a`
Marketing `div.widgetTop > ul.cloud > li > a`
Meccanica `div.widgetTop > ul.cloud > li > a`
Ottica e Gioielleria `div.widgetTop > ul.cloud > li > a`
Pelli e calzature `div.widgetTop > ul.cloud > li > a`
Professionisti `div.widgetTop > ul.cloud > li > a`
Ristorazione `div.widgetTop > ul.cloud > li > a`
Servizi per aziende `div.widgetTop > ul.cloud > li > a`
Telecomunicazioni `div.widgetTop > ul.cloud > li > a`
Tempo libero `div.widgetTop > ul.cloud > li > a`
Tessile e Abbigliamento `div.widgetTop > ul.cloud > li > a`
Trasporti `div.widgetTop > ul.cloud > li > a`
Viaggi e turismo `div.widgetTop > ul.cloud > li > a`
Learn more `div.fc-dialog-content > div.fc-dialog-scrollable-content > button.fc-faq-header > span.fc-faq-label`

These are opportunities to improve the legibility of your content.

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
div.navbar-header > ul.nav > li > a `div.navbar-header > ul.nav > li > a`
div.navbar-header > ul.nav > li > a `div.navbar-header > ul.nav > li > a`
div.navbar-header > ul.nav > li > a `div.navbar-header > ul.nav > li > a`
div.streamUnitContent > div.photoContent > div.photoImage > a `div.streamUnitContent > div.photoContent > div.photoImage > a`
div.streamUnitContent > div.photoContent > div.photoImage > a `div.streamUnitContent > div.photoContent > div.photoImage > a`
div.streamUnitContent > div.photoContent > div.photoImage > a `div.streamUnitContent > div.photoContent > div.photoImage > a`
div.streamUnitContent > div.photoContent > div.photoImage > a `div.streamUnitContent > div.photoContent > div.photoImage > 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.

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
Installazione di Impianti a Torino `div.widgetTop > ul > li > a`
Costruzione di Edifici a Bologna `div.widgetTop > ul > li > a`
Bar e ristorazione a Udine `div.widgetTop > ul > li > a`
Agenzie di viaggio a Roma `div.widgetTop > ul > li > a`
Servizi di Pulizia a Genova `div.widgetTop > ul > li > a`

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
Tutti i filtri `div.contentContainer > ul.pull-right > li.dropdown > a.dropdown-toggle`

○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

●`[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

●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.

●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

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

○`[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

○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

○Form elements have associated labels

○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.

○`[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.

○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.

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
Trovalo - Edison - T-Shirt bianca Uomo \| Liula `div.productContent > div.productImage > a > img`	www.coobiz.it/images/products/product_198/image-ubs1647120412.jpg	254 x 254	262 x 262	381 x 381
Coobiz, il social network delle aziende `div.navbar > div.navbar-header > a.navbar-brand > img`	www.coobiz.it/styles/images/coobiz/logo.png	127 x 35	127 x 35	191 x 53
Logo social dell'attività Liula `li#stream_unit_269426 > div.media-left > a.balloonPreview > img.img-company`	/images/companies/company_1394155720/image-smallmedium163...	58 x 58	60 x 60	87 x 87
Logo mini utente eleonora senese `li#stream_unit_269426 > div.media-left > a.authorMini > img.img-user`	www.coobiz.it/styles/images/coobiz/user_no_image/social.gif	28 x 28	30 x 30	42 x 42

●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

●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

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`