Core Web Vitals (CWV) are a set of real-world, user-centred performance metrics Google uses as a ranking signal: Largest Contentful Paint (LCP) for loading, Interaction to Next Paint (INP) for responsiveness, and Cumulative Layout Shift (CLS) for visual stability.
Check your own site's real INP, LCP and CLS scores with the Core Web Vitals & INP Checker.