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We just launched experimental ad metrics in the Chrome User Experience Report (CrUX): - Ad Count - Ad Density - Ad Weight: Network - Ad Weight: CPU These metrics are a set of ad-related measurements that provide transparency into sites' ad experiences. developer.chrome.com/blog/crux-ad... 1/8 🧵

developer.chrome.comNew ad metrics in Chrome User Experience Report | Blog | Chrome for DevelopersLearn about the new ad metrics now available in the Chrome User Experience Report (CrUX)

15/9/26, 4:29 pm14 reposts30 likes

Inspired Taste

@inspiredtaste.net

16 Sept

This is an amazing feature @johnmu.com and @tunetheweb.com 👏 We noticed some anomalies with some measurements. Just noticed that Barry already troubleshooted, found the culprit, and emailed on the Google group. Amazing! Really looking forward to see this feature mature 😀

SEO Expert

@seo-expert.site

Useful addition. One caveat: Ad Weight: CPU only covers ad frames/subresources, not main-frame ad scripts. On publisher sites that may understate the real impact on INP/LCP when auction/bootstrap code runs in the top frame. Pairing this with CWV + DevTools should help expose that gap.

Barry Pollard

@tunetheweb.com

15 Sept

Ad Count is the average number of ads in the viewport. Ad Density is the average % of the viewport area occupied by ads. Ad Weight: Network is the total network KB fetched by ad scripts and frames. Ad Weight: CPU is milliseconds of CPU time used by ads frames. developer.chrome.com/docs/ads 2/8

developer.chrome.comChrome ad measurements | Ads | Chrome for DevelopersUser ad experiences in Chrome.

Barry Pollard

@tunetheweb.com

15 Sept

We think these are some of the key measures of ad experiences and are excited to share this data. It's difficult to measure these types of metrics given technical constrains on the web platform, so CrUX is in a unique position to publish this data. 3/8

Barry Pollard

@tunetheweb.com

15 Sept

The metrics are available in the CrUX API and the CrUX History API today and you can view these metrics for sites with third-party ads in CrUX Vis: cruxvis.withgoogle.com We're working on adding them to CrUX BigQuery dataset. 4/8

cruxvis.withgoogle.comCrUX VisCrUX Vis is a tool by the Chrome team to help you explore the Chrome User Experience Report (CrUX) data with visualizations and helpful links to articles, for a particular web page or origin.

Max

@maxwellcohen.bsky.social

15 Sept

Will this data get integrated into PageSpeed Insights and the PageSpeed API?

Barry Pollard

@tunetheweb.com

15 Sept

We've heard from a large cross-section of ad ecosystem stakeholders that these metrics could enhance how they value ad opportunities and make ad product decisions. We're encouraged by this as we think users ultimately benefit from more collective attention paid to tuning web ad experiences. 5/8

Rowan Merewood

@rowan.fyi

15 Sept

I couldn't immediately see a way to view these on mobile, but switching to desktop mode does give me the side navigation.