Web Vitals

Largest Contentful Paint (LCP) measures a page’s loading. The goal here should be a LCP within 2.5 seconds once the page starts loading.

First Input Delay (FID) measures a page’s interactivity. A solid user experience here means there’s a FID of less than 100 milliseconds.

Cumulative Layout Shift (CLS) measures a page’s visual stability. For a good user experience, CLS should be less than 0.1 seconds..