Core Web Vitals

Core Web Vitals are Google's three field metrics for real-user page experience: Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness), and Cumulative Layout Shift (visual stability). Thresholds at the 75th percentile of real Chrome users: LCP under 2.5 seconds, INP under 200 milliseconds, CLS under 0.1. They are a confirmed but modest ranking signal; field data comes from the Chrome UX Report.