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Time to First Byte (TTFB)Experimental is the time it takes to receive the first byte from the server. A fast TTFB indicates that the server responses quickly.Learn more at web.dev/ttfb/→

First Contentful Paint (FCP) marks the time when the user can see anything on the screen. A fast FCP helps reassure the user that something is happening.Learn more at web.dev/fcp/→

Largest Contentful Paint (LCP)Core Web Vital marks the time when the page's main content has likely loaded. A fast LCP helps reassure the user that the page is useful.Learn more at web.dev/lcp/→

Interaction to Next Paint (INP)Core Web Vital measures interaction latency. It observes the latency of all interactions a user has made with the page, and reports a single value which all (or nearly all) interactions were below. A low INP means the page was consistently able to respond quickly to user interactions.Learn more at web.dev/inp/→

Cumulative Layout Shift (CLS)Core Web Vital quantifies how often users experience unexpected layout shifts. A fast CLS indicates that the page is delightful.Learn more at web.dev/cls/→