Core Web Vitals are Google's way of measuring how a page feels to use.
The three numbers
- LCP (Largest Contentful Paint): how fast the main content appears. Usually fixed by compressing large images and loading them early.
- INP (Interaction to Next Paint): how quickly the page responds when someone taps or clicks. Usually fixed by doing less JavaScript work.
- CLS (Cumulative Layout Shift): how much things jump around while loading. Usually fixed by giving images and embeds a set size.
Check yours for free with PageSpeed Insights, and fix the biggest red item first.