Google has added an experimental ad-experience measurement tool to the Chrome User Experience Report, or CrUX. Advertisers and publishers can assess more than the number of placements by comparing the burden ads place on a user's screen, network, and device.
The tool reports four metrics: average ads in view, the share of screen area occupied by ads, network bytes used by ads, and advertising-related CPU task time. Two pages with the same number of placements may feel very different when creative size, transfer weight, and script execution differ.
More placements can create short-term inventory, but slower loading and interaction may increase abandonment and reduce return visits. Publishers can compare revenue by position against visual area, network cost, and CPU work. Together with AdSense's move to count impressions at begin-to-render, the update shows measurement moving closer to what actually appears and runs on the page.
Google plans to provide the aggregate data to independent third-party ad platforms at the same time, opening the possibility of a shared benchmark beyond a single ad stack.
Start by comparing ad count and screen share across page types, then separate heavy creative transfers from CPU-intensive scripts. Test fewer placements or delayed loading and measure the effect on revenue, abandonment, and Core Web Vitals.
Because the feature is experimental, no single metric should be treated as a final quality score. Trends by device, geography, and page type should be interpreted alongside existing performance data.
It reports average ad count, ad screen-area share, network bytes, and CPU task time.
The feature is described as experimental at the time of the announcement.
Google says aggregated data will also be made available to independent external ad platforms.
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