Web Vitals Optimization: Achieve Core Web Vitals Score 90+ in 2026

Web Vitals Optimization: Achieve Core Web Vitals Score 90+ in 2026 Core Web Vitals directly affect Google search rankings. A score under 50 hurts your SEO; above 90 gives you a ranking boost. Here's a systematic guide to achieving and maintaining 90+ scores. The 2026 Core Web Vitals Metrics Metric What It Measures Good Needs Work Poor LCP (Largest Contentful Paint) Loading speed <2.5s 2.5-4s >4s INP (Interaction to Next Paint) Responsiveness <200ms 200-500ms >500ms CLS (Cumulative Layout Shift) Visual stability <0.1 0.1-0.25 >0.25 INP replaced FID (First Input Delay) in March 2024 and is the metric most developers underestimate. Measure First PageSpeed Insights (Field Data) Test your real URLs at pagespeed.web.dev . It shows both lab data (Lighthouse) and field data (real user Chrome data). Field data is what Google uses for rankings. Lighthouse CI in Your Pipeline # GitHub Actions: block deploys when vitals regress - name : Run Lighthouse CI uses : treosh/lighthouse-ci-action@v11 with