Web Development8 min read
Core Web Vitals & INP: How to Score 100% Green on PageSpeed Insights in 2025
Joni Piwal
Lead Performance Engineer • Published February 16, 2025
## Understanding INP: Replacing FID as a Core Ranking Metric
Google officially replaced First Input Delay (FID) with **Interaction to Next Paint (INP)** as an official Core Web Vitals ranking factor.
INP measures the latency of every single user interaction throughout the entire page lifecycle. Debugging long tasks (>50ms), preloading critical LCP hero images, and reserving layout space for dynamic elements guarantees 100% green scores.
Upgrade your site performance with our [Technical SEO & Speed Optimization Services](/services/technical-seo).
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About the Author: Joni Piwal
Lead Performance Engineer
Web performance specialist optimizing enterprise codebases for green Chrome User Experience Report (CrUX) field metrics.
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