What are Core Web Vitals?

Core Web Vitals are a set of specific, measurable metrics defined by Google to quantify real-world user experience on the web — and they directly influence Google search rankings. Introduced as official ranking signals in 2021, these metrics measure page loading performance, visual stability, and interaction responsiveness.

The Three Core Metrics

• LCP (Largest Contentful Paint): Measures how long it takes for the largest visible content element (a hero image, heading, or block of text) to finish rendering. A good LCP score is under 2.5 seconds.
• INP (Interaction to Next Paint): Measures the latency between a user's interaction (click, tap, keypress) and the browser's next visual response. This replaced FID as the responsiveness metric in 2024. A good INP is under 200 milliseconds.
• CLS (Cumulative Layout Shift): Measures the total amount of unexpected visual movement during page load — for example, content shifting when an ad loads above it. A good CLS score is under 0.1.

How to Improve Core Web Vitals

Key optimization techniques include image compression and next-gen formats (WebP/AVIF), lazy loading, critical CSS inlining, server-side caching, CDN deployment, and improving server response times (TTFB). Google Search Console provides a free Core Web Vitals report showing your site's current status across all pages. At Teknobursa, Core Web Vitals optimization is a standard part of every web project we deliver.