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-