In Brief
Google's user experience metrics measuring loading performance, interactivity, and visual stability.
Core Web Vitals are Google's specific metrics for measuring user experience: LCP (Largest Contentful Paint) for loading, INP (Interaction to Next Paint) for interactivity, and CLS (Cumulative Layout Shift) for visual stability. They became ranking factors in 2021. Good scores require LCP under 2.5s, INP under 200ms, and CLS under 0.1.