CrUX, short for Chrome User Experience Report, is a public dataset provided by Google that captures real-world user experience metrics from Chrome browser users across the globe. The report collects anonymized data on key performance indicators such as page load times, interactivity, and visual stability, reflecting how actual users experience websites. CrUX is widely used by web developers and site owners to assess and improve site performance, as it offers insights based on real user devices and network conditions rather than synthetic lab tests. The dataset is updated monthly and is accessible through tools like Google BigQuery, PageSpeed Insights, and the Chrome UX Report API.