# Core Web Vitals

A set of three core metrics (LCP, INP, CLS) that Google uses as a page experience signal and that measure loading speed, interactivity, and visual stability.

**Core Web Vitals (CWV)** consists of three core metrics that Google defines to measure the quality of a page’s user experience. Since 2021, it has been used as an official ranking signal.

The three metrics:

- **LCP (Largest Contentful Paint):** How long it takes for the page’s main content to load. Target: under 2.5 seconds.
- **INP (Interaction to Next Paint):** How quickly the page responds to user interactions. Target: under 200 ms. (It replaced FID in March 2024.)
- **CLS (Cumulative Layout Shift):** How much the content shifts and moves around while the page is loading. Target: under 0.1.

Core Web Vitals is measured not from lab data but from _real user (field)_ data, and it is reported to Google through the Chrome User Experience Report (CrUX). You can see your site’s status in the “Core Web Vitals” report in Search Console.

**Tip:** Even if CWV is good, rankings will not improve if the content is weak; however, if the content is good but CWV is poor, rankings may drop. The right approach is to treat it as a hygiene factor.