Core Web Vitals

Definition

Core Web Vitals are a set of three specific metrics that Google uses to evaluate user experience on web pages. LCP (Largest Contentful Paint) measures loading performance — the time it takes for the largest content element to become visible. Target: under 2.5 seconds. CLS (Cumulative Layout Shift) measures visual stability — how much page content shifts unexpectedly during loading. Target: under 0.1. INP (Interaction to Next Paint) measures responsiveness — the delay between user interaction and the browser's visual response. Target: under 200ms. Since 2021, Core Web Vitals are a confirmed Google ranking factor.