What three core metrics make up Core Web Vitals?

Core Web Vitals consist of three core metrics:

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#1. LCP (Largest Contentful Paint)

What it measures: How long it takes for the largest visible element on the screen to render (for example, a large heading or an image). Target: no more than 2.5 seconds.

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#2. INP (Interaction to Next Paint)

What it measures: The responsiveness of the interface: how much time passes between a user's action (a click, an input) and the interface's visual reaction. Target: no more than 200 ms. (INP replaced the deprecated FID metric in March 2024.)

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#3. CLS (Cumulative Layout Shift)

What it measures: How much the interface jumps while loading, for example, when text or buttons shift. Target: a score below 0.1.

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These metrics reflect the real user experience: how fast, smooth, and predictable the site is.