Core Web Vitals are a set of specific metrics that Google uses to measure the user experience of a website. They focus on three main aspects: loading performance, interactivity, and visual stability. These metrics help website owners understand how quickly their pages load, how responsive they are to user actions, and how stable the content appears during loading. The three key components of Core Web Vitals are Largest Contentful Paint (LCP), which measures loading speed; First Input Delay (FID), which assesses interactivity; and Cumulative Layout Shift (CLS), which evaluates visual stability. Improving these metrics can enhance user satisfaction and potentially boost a site's ranking in search results.