CrUX (Chrome UX Report)
CrUX, short for the Chrome User Experience Report, is Google's public dataset of how real Chrome users experience websites, including how fast pages load, how quickly they respond and how much they jump around. Google says Search uses it when it weighs how easy pages are to use in ranking. Sites without enough visitors aren't included.
Source: Chrome for Developers, Overview of CrUX and CrUX methodology, checked October 29, 2026
What CrUX (Chrome UX Report) means for your business
It only counts Chrome users who've turned on usage statistics and synced their browsing history, on desktop and Android. Chrome on iPhone isn't in it. A page, or a whole site, also has to pass a minimum number of visitors, and Google doesn't publish what that number is.
If your site is small, it may not have enough Chrome visits to appear. Then PageSpeed Insights and the CrUX API have no real-visitor numbers to show you for it.
We'd check it once, fix anything that's plainly slow, and move on. Google's own explainer on ranking says that when other things are about equal, pages people find easier to use may do better.
If speed scores are eating time you'd rather spend on calls and bookings, the numbers in our quarterly report lead with those.
Last reviewed October 29, 2026. All terms
How AI answers it today
On October 29, 2026, both answers to "what is crux" gave only the everyday word, the heart of a problem. Google's AI Overview cited dictionaries, Quora and Instagram, and ChatGPT cited nothing; neither mentioned Chrome or Google's dataset.
Our run through ChatGPT and Google's AI Overview, October 29, 2026. A sample, not what every buyer sees.
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