SEO
INP (Interaction to Next Paint)
Quick definition
INP is a Core Web Vitals metric measuring how quickly a page responds to user interactions, replacing First Input Delay (FID) in 2024.
INP target: under 200ms for 'Good'. It captures the latency of all interactions, not just the first — a tougher metric than the FID it replaced.
Why INP (Interaction to Next Paint) matters
High INP usually points to heavy JavaScript execution blocking the main thread — frameworks, hydration, and third-party scripts are common culprits.
How INP (Interaction to Next Paint) works in practice
Improve INP by breaking up long tasks, code-splitting, deferring non-critical JavaScript, and auditing third-party scripts (analytics, tag managers, chat widgets).
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Related terms
Core Web Vitals
Core Web Vitals are a set of Google-defined user-experience metrics measuring loading performance (LCP), interactivity (INP), and visual stability (CLS).
LCP (Largest Contentful Paint)
LCP is a Core Web Vitals metric measuring how long it takes for the largest visible element above the fold to render.
Page Speed
Page speed is how fast a webpage loads and becomes interactive — a key user experience signal and a confirmed (modest) Google ranking factor.