INP measures the latency of all interactions a user has with a page and reports a single representative value. A good INP is 200 ms or less. It became a Core Web Vital in March 2024, replacing First Input Delay (FID).
Interaction to Next Paint (INP)
Definition
A Core Web Vital that measures how quickly a page visibly responds to user interactions; it replaced First Input Delay in 2024.
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Pillar Guide
Core Web Vitals — Complete Guide