Core Web Vitals are a set of specific metrics that Google uses to measure user experience on your website. Understanding and optimizing these metrics is essential for both SEO performance and providing a great experience for your visitors.
The Three Core Metrics
Largest Contentful Paint (LCP) measures how quickly the main content of a page loads — aim for under 2.5 seconds. Interaction to Next Paint (INP) measures how quickly your page responds to user interactions — aim for under 200 milliseconds. Cumulative Layout Shift (CLS) measures visual stability — aim for a score below 0.1 to prevent annoying content jumps.
How to Measure Your Scores
Google provides several tools to measure Core Web Vitals, including PageSpeed Insights, the Chrome User Experience Report, and Google Search Console. Use field data (real user measurements) rather than lab data alone for the most accurate picture of your site’s performance.
Practical Optimization Tips
For LCP, focus on optimizing your largest above-the-fold element — usually a hero image or heading. For INP, reduce JavaScript execution time and break up long tasks. For CLS, always specify dimensions for images and embeds, and avoid inserting content above existing content after the page has loaded.
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