Web Vitals
TTFB: Time To First Byte
Time it takes for a client to receive the first byte of page content
FCP:First Contentful Paint
Time it takes the browser to render the first piece of content after navigation
LCP:Largest Contentful Paint
Time it takes to load and render the page's main content
TTI:Time To Interactive
Time from when the page starts loading to when it's reliably responding to user input quickly
CLS:Cumulative Layout Shift
Measures visual stability to avoid unexpected layout shift
FID:First Input Delay
Time from when the user interacts with the page to the time when the event handlers are able to run.