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SEO8 min read
Core Web Vitals in 2026: what still matters
INP, LCP and CLS — what changed, what stayed and which numbers actually move rankings in 2026.
Core Web Vitals are still a tiebreaker, not a primary ranking factor. But on competitive queries, tiebreakers decide everything.
Largest Contentful Paint (LCP)
Preload the hero image. Avoid large hero videos above the fold. Use modern formats (AVIF, WebP) and a CDN. Eliminate render-blocking CSS.
Interaction to Next Paint (INP)
Break up long tasks, defer non-critical JS, prefer CSS over JS for animations, and audit your third-party scripts ruthlessly.
Cumulative Layout Shift (CLS)
Reserve space for images, embeds and ads. Use font-display: swap with sized fallbacks.
Tooling that matters
- PageSpeed Insights for a quick read.
- CrUX dashboard for field data trends.
- Real User Monitoring (RUM) for ongoing alerting.
Where to stop
Once you are green on 75% of visits, additional performance work has diminishing SEO returns. Reinvest in content and entity work.
Frequently asked questions
- Is INP harder than FID?
- Yes — it measures all interactions, not just the first.
- Do CWV affect AI Search?
- Indirectly. Slow sites are crawled less often, which slows your GEO improvements.
- Should I use AMP?
- No. AMP has been deprecated for SEO purposes since 2022.
Core Web VitalsPerformanceSEO
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