Definition
Core Web Vitals are three user-experience metrics defined by Google: Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness) and Cumulative Layout Shift (visual stability).
Core Web Vitals explained
They are measured from real Chrome users and reported in Search Console and PageSpeed Insights.
Good scores support a better experience and are a ranking signal, but relevance and content quality still matter more.
Key points
- LCP: how quickly the main content appears
- INP: how quickly the page responds to interactions
- CLS: how much the layout jumps while loading