Technical SEO Wiki Entry

CrUX (Chrome User Experience Report)

A public dataset of real-world performance data collected from Chrome users.

CrUX aggregates anonymised performance metrics from Chrome users who opt in, providing real-user Core Web Vitals data for any public URL. CrUX powers PageSpeed Insights field data and is the source for Google's ranking signals. Sites with insufficient CrUX traffic show no field data and rely on lab metrics until enough real-user samples accumulate.

Related Entries

PageSpeed Insights

Google's public performance testing tool combining lab and real-user data.

Core Web Vitals

Google's page experience metrics measuring loading, interactivity and stability.

Real User Monitoring (RUM)

Performance measurement based on actual visitor experiences in their real environments.

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