Encyclopedia / SEO & GEO

Core Web Vitals

Google's three measures of how a page feels to use.

LCP (Largest Contentful Paint) measures load speed: aim for 2.5 s or less. INP (Interaction to Next Paint) measures responsiveness: 200 ms or less. CLS (Cumulative Layout Shift) measures visual stability: 0.1 or less. Google measures them on real visitors' devices, and they're a ranking signal.

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Performance Lighthouse Images

Where it shows up in a page load

  1. Step 9: Style, layout, paint. CSS is applied to the DOM. The browser works out where every box goes (layout) and draws the pixels (paint). The moment the largest piece of content appears is called LCP, and it's one of Google's Core Web Vitals.

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More in SEO & GEO

How search engines and AI systems find, read and describe the site.

Title tag Meta description Canonical URL Robots meta / noindex robots.txt Sitemap Open Graph & social cards Structured data (JSON-LD) Internal links Backlinks Search Console GEO (generative engine optimization) llms.txt

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