Cloudflare Browser Insights is a free web analytics tool that provides real user monitoring (RUM) data about website performance from actual visitor experiences. Introduced as part of Cloudflare's web performance suite, it collects metrics on page load times, Core Web Vitals, and other performance indicators directly from users' browsers. Browser Insights measures key metrics including Largest Contentful Paint (LCP), First Input Delay (FID), Cumulative Layout Shift (CLS), First Contentful Paint, and Time to First Byte. The service operates with minimal performance impact through efficient data collection and aggregation on Cloudflare's edge network. It provides geographic breakdowns showing performance variations across different regions and devices. Browser Insights complements Cloudflare's server-side analytics by showing actual user experience rather than just server response times. The tool is privacy-focused, collecting only performance metrics without tracking individual users or requiring cookies.