Glossary
Core Web Vitals
Google's UX performance metrics: LCP, INP, CLS.
In depth
LCP (Largest Contentful Paint) measures loading. INP (Interaction to Next Paint) replaced FID in 2024 and measures responsiveness. CLS (Cumulative Layout Shift) measures visual stability. Thresholds: LCP < 2.5s, INP < 200ms, CLS < 0.1.