Core Web Vitals & metrics
10 terms from the Performance & Core Web Vitals category.
- Core Web Vitals
Core Web Vitals are three metrics Google uses to describe the user experience of a web page.
- Cumulative Layout Shift (CLS)
Cumulative Layout Shift (CLS) is a Core Web Vitals metric for visual stability. web.dev defines it as the largest burst of layout shift …
- First Contentful Paint (FCP)
First Contentful Paint (FCP) is a performance metric for the time between the start of navigation and the moment the first piece of …
- First Input Delay (FID)Historical
First Input Delay (FID) was a Core Web Vitals metric.
- Interaction to Next Paint (INP)
Interaction to Next Paint (INP) is a Core Web Vitals metric for how quickly a page responds.
- Largest Contentful Paint (LCP)
Largest Contentful Paint (LCP) is a Core Web Vitals metric for loading speed.
- Page experience
Page experience is Google's term for the signals that show how pleasant a page is for visitors.
- Speed Index
Speed Index is a lab metric for page speed.
- Time to First Byte (TTFB)
Time to First Byte (TTFB) is the time between the start of navigation to a page and the moment the first byte of the response arrives. …
- Total Blocking Time (TBT)
Total Blocking Time (TBT) is a lab metric.