Performance & Core Web Vitals · Glossary term

Core Web Vitals (CWV) explained without jargon.

Set of 3 Google metrics for web performance: LCP, INP, CLS. Ranking factor since 2021.

← Back to glossary See Speed module →

Extended definition

Set of 3 Google metrics for web performance: LCP, INP, CLS. Ranking factor since 2021.

Context and application

Core Web Vitals aren’t the only performance factor, but they’re the only ones with explicit Google thresholds and direct impact on ranking. Data comes from Chrome User Experience Report (CrUX) — your real numbers collected by Chrome browsers from real users, NOT synthetic tests. This means lab data (local Lighthouse) can differ from field data (CrUX). For ranking, field data matters. Optimizations that look good in lab but bad in field (e.g., super-fast server for you, slow for real users on 4G) don’t help SEO.

In practice

we track them weekly with trends in Speed.

How SEO Master PRO MAX helps

For Core Web Vitals (CWV), the relevant module in the app is Speed module. See the dedicated page for how it works concretely on your site.

See Speed module →

Related terms

SEO Audit.

Rest of the glossary

The SEO Master PRO MAX glossary has 58 essential terms, organized in 7 categories (Audit & Technical SEO · Content & On-page · Performance & Core Web Vitals · Backlinks & Authority · AI & Search 2026 · SERP, Schema & Rich Results · Privacy & Compliance). All with clear definitions, extended context, concrete examples.

← All 58 terms Category: Performance & Core Web Vitals

Now that you know what core web vitals (cwv) is, apply it on your site.

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