What Are Core Web Vitals?

The Three Current Metrics Measure Distinct Failures.

Largest Contentful Paint measures when the main content becomes visible. Interaction to Next Paint measures how quickly the page responds when someone actually interacts with it. Cumulative Layout Shift measures how much content jumps around as things load.

Technical search specialists analysing Core Web Vitals metrics and search crawler behaviour — Optimizing Core Web Vitals ensures complete search engine discoverability and sustainable organic rankings.

They are graded on field data (what real visitors experienced), not on a laboratory test.: This is why a perfect score in a synthetic tool can coexist with a failing assessment: your visitors may be on slower devices and networks than the test machine.
As a ranking input they are modest and situational, most likely to matter between pages of otherwise similar relevance.: As a conversion input they are not modest at all. Layout shift that moves a button under a thumb, or a page that ignores a tap for a second, costs enquiries regardless of ranking.
The common causes are unglamorous: images without dimensions
fonts that swap late
third-party scripts blocking the main thread
content injected above existing content after load

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Frequently Asked Questions

Do Core Web Vitals Affect Rankings?

They are a ranking input, but a modest one that mainly separates pages of similar relevance. Content and relevance dominate. The stronger commercial argument for fixing them is conversion, not position.

Why Does Our Score Differ Between Tools?

Laboratory tools simulate one device and connection. The assessment that counts uses field data from real visitors, whose devices and networks are usually slower than the test environment.

What Does This Cover?

Core Web Vitals are a small set of measurements Google uses to describe page experience: how quickly the main content appears, how quickly the page responds to input, and how much the layout moves while loading.

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Core Web Vitals

The Three Current Metrics Measure Distinct Failures.

Frequently Asked Questions

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Core Web Vitals

The Three Current Metrics Measure Distinct Failures.

Frequently Asked Questions

Where this applies

Related Services

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