Performance
Core Web Vitals
Google's three user-experience metrics: LCP for loading, INP for responsiveness, and CLS for visual stability. Together they feed directly into search rankings.
Core Web Vitals are the three metrics Google uses to quantify real-world user experience, and they are a confirmed ranking signal. Largest Contentful Paint (LCP) covers loading: how quickly the main content appears. Interaction to Next Paint (INP) covers responsiveness: how fast the page reacts to taps and clicks. Cumulative Layout Shift (CLS) covers visual stability: how much the layout moves as it loads.
Google reads these from real visitors through the Chrome User Experience Report, not just lab tests, so they reflect what your actual audience feels. The thresholds for a good score are LCP under 2.5 seconds, INP under 200 milliseconds, and CLS under 0.1.
Passing all three is table stakes for competitive search visibility, and it matters even more for conversion. Faster, steadier pages hold attention and turn more visitors into leads. It is the most measurable lever in technical SEO, which is why we treat it as a build requirement rather than an afterthought.