Core Web Vitals are Google metrics that evaluate the user experience across three dimensions: loading speed (LCP), interaction responsiveness (INP) and visual stability (CLS). Sites that meet Google's recommended thresholds gain an advantage in organic rankings.
The ideal values are: LCP below 2.5 seconds (measures the time until the largest visible element loads), INP below 200 milliseconds (measures the time between a user interaction and the page's visual response) and CLS below 0.1 (measures how much elements shift during loading).
To improve Core Web Vitals, the most common actions are: optimizing images (modern formats like WebP/AVIF, lazy loading), minifying CSS and JavaScript, using a CDN, implementing proper caching and avoiding render-blocking scripts. Google PageSpeed Insights and the Core Web Vitals report in Search Console are the reference tools.