Core Web Vitals Explained: Why Site Speed Affects Your Rankings
Digital Marketing · SEO · Updated 2026
The Three Core Web Vitals
| Metric | What It Measures | Good Threshold |
|---|---|---|
| Largest Contentful Paint (LCP) | How long the main content takes to load | Under 2.5 seconds |
| Interaction to Next Paint (INP) | How responsive the page feels when a user interacts with it | Under 200 milliseconds |
| Cumulative Layout Shift (CLS) | How much visual content unexpectedly shifts while loading | Under 0.1 |
Why Google Cares About Speed
Core Web Vitals are part of Google’s page experience signals – sites that load quickly and feel stable and responsive tend to keep visitors engaged, which aligns with Google’s goal of sending searchers to pages that won’t frustrate them.
Common Fixes
Compress and properly size images, enable browser caching, minimize unnecessary JavaScript, and reserve space for images and ads before they load so content doesn’t jump around as the page renders.
How to Check Your Scores
Google’s free PageSpeed Insights tool and Search Console’s Core Web Vitals report both show real-world performance data for your site, broken down by page.
Want your site’s speed and Core Web Vitals reviewed?
Frequently Asked Questions
Do Core Web Vitals directly affect rankings?
They are one of many ranking signals – not the dominant factor, but poor scores can hold back an otherwise strong page, especially in competitive niches.
What is the easiest Core Web Vital to improve?
Cumulative Layout Shift is often the quickest win, usually fixed by reserving space for images and ads so content does not jump around while loading.
How can I check my site’s Core Web Vitals?
Google’s free PageSpeed Insights tool and the Core Web Vitals report inside Google Search Console both show real-world performance data.
