iab.com website review

148 files are served with short cache lifetimes, so returning visitors download them again (12.5 MB).

30 files block the first paint until they finish downloading. Deferring or inlining them could save about 3.0 s.

About 479 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 2.4 s faster on a phone.

About 193 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 1.2 s faster on a phone.

Your mobile performance score is 42. Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

27 images could be 7.0 MB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

8 third-party services load with your homepage (Google Tag Manager, Hubspot and JSDelivr CDN and others), adding 1.1 MB and 1.2 s of main-thread time.

A phone's processor spends 4.0 s on main-thread work while loading, 1.7 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

Google Tag Manager costs a phone 302 ms of main-thread work and 314 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

Hubspot costs a phone 302 ms of main-thread work and 302 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

The page has 1,836 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

52 KiB could be saved by minifying JavaScript.

15 long tasks block the main thread while loading, the longest for 217 ms. During a long task the page ignores taps.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 100 ms).

Polyfills for old browsers add 36 KiB JavaScript that modern phones do not need.

6 KiB could be saved by minifying CSS.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

Real visitors wait 6.2 s for the largest content to appear (75th percentile). Good is under 2.5 s.

Real visitors see the first content after 5.2 s (75th percentile). Good is under 1.8 s.

Real visitors wait 3.5 s for your server to start answering (75th percentile). Good is under 800 ms.

Your largest element takes 16.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Audio Measurement Just Released! Amplifying Audio's Impact …”.

The page becomes fully interactive after 17.4 s. Good is under 3.8 s.

The first text or image appears after 4.0 s on a phone. Good is under 1.8 s.

Visually, the page fills in at 7.2 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 778 ms in total while the page loads. Good is under 200 ms.

Real visitors wait 278 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.

2 images have no width and height attributes, so the layout jumps as each one loads.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 6.4 s to 6.0 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 13.3 MB in 184 requests on a phone: images 11.6 MB (93), scripts 1.2 MB (56) and stylesheets 217 KiB (18). Under 2 MB keeps phones on slow connections fast.

roundel-2.jpg weighs 711 KiB. On a phone connection a single image that size takes seconds.

23 images (3.3 MB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

3 images further down the page (119 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 3.76 g of CO₂e: 451.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination: 2 elements on the page fail this check, rated moderate by axe-core.

5 visible links have no text or label, so screen readers cannot say where they go.

ARIA role should be appropriate for the element: 9 elements on the page fail this check, rated minor by axe-core.

Elements marked as presentational should be consistently ignored: 9 elements on the page fail this check, rated minor by axe-core.

Headings skip levels (h1 → h3 and h3 → h5), which makes the page harder to scan with a screen reader.

Your title is only 3 characters: “IAB”. Between 30 and 65 characters leaves room to say what you do and for whom.

1 link use generic text like “click here” or “learn more”, which tells Google nothing about the page behind it.

Your <h1> is empty.

The homepage links to 256 pages on iab.com and 11 external pages.

/topics/public-policy, /topics/legal-affairs and /research are marked noindex but linked from your homepage. If they are meant to be found, remove the noindex.

/topics/public-policy, /shop, /organizations/experience-center, /organizations/media-center, /online-training-access and /research and 2 others have no meta description, so Google writes the search snippet from whatever text it finds.

Your homepage links to 1 page by a URL that isn't its canonical one, for example /organizations/professional-development-and-education-center, whose canonical is /organizations/professional-development-and-education. Linking straight to the canonical URL saves crawlers a detour and keeps ranking signals on one address.

We fetched 15 pages linked from your homepage (of 90 found) and read each the way a search engine does.

Large scripts ship without source maps.

No Strict-Transport-Security header, so browsers may still try plain http first on a return visit.

No Content-Security-Policy header, the main browser-side defence against injected scripts.

Neither X-Frame-Options nor a CSP frame-ancestors policy is set, so any site can embed yours in a frame.

X-Content-Type-Options: nosniff is missing, so browsers may guess file types.

3 links go through two or more redirects, for example https://www.iab.com/topics/public-policy.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

iab.com has no CAA record, so any certificate authority may issue a certificate for it. A CAA record naming your provider (for example letsencrypt.org) closes that door.

iab.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

Social proof on the homepage: “700+ members”. Pairing it with named testimonials or customer logos makes it far more convincing.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 371 words of visible text.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Before a visitor clicks anything, the page loads Google Analytics, Google Tag Manager, HubSpot and LinkedIn Insight (measured from a US location before any click). A consent tool (OneTrust) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 8 cookies (measured from a US location before any click).

Loading the homepage contacts 16 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.