Core Web Vitals SEO Guide

Core Web Vitals measure parts of the page experience that affect real users: loading, interaction responsiveness, and visual stability.

They matter for SEO because slow or unstable pages can reduce user satisfaction and make search performance harder to sustain. They are still one part of a larger system.

What to measure

• Largest Contentful Paint: how quickly the main visible content loads.
• Interaction to Next Paint: how responsive the page is after user input.
• Cumulative Layout Shift: how stable the layout is while loading.

What usually improves scores

• Serve correctly sized images.
• Reduce render-blocking CSS and JavaScript.
• Cache static assets aggressively.
• Avoid injecting late layout-changing elements.
• Keep third-party scripts under control.
• Use static rendering when a page does not need heavy client behavior.

How to prioritize

Fix crawl and indexation blockers first. Then focus on templates that affect many URLs, such as article pages, service pages, product pages, and local landing pages.

Performance work is most valuable when it improves both search visibility and user conversion.