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Interaction to Next Paint (INP) is a webpage responsiveness metric measuring the latency of all user interactions on a page. Optimizing your website’s INP metric plays a crucial role in its speed, user experience, and SEO.
Announced in 2022 as an experimental metric to address many limitations of the First Input Delay (FID) metric, Google declared that INP will replace FID as a Core Web Vital metric in March 2024.
This post will explore the basics of INP, why it is replacing FID, and how you can measure and improve your site’s INP metric.