Google May Replace FID With INP (Interaction to Next Paint) For Core Web Vitals - Search Engine Roundtable

At Google I/O last week, Google's Annie Sullivan and Michal Mocny introduced a new metric named INP or Interaction to Next Paint. INP measures overall responsiveness to user interactions on the page and it may or may not replace FID, First Input Delay, as a Core Web Vitals metric.

I know a lot of SEOs obsess about Core Web Vitals, despite it not being an even subtle ranking signal, but because it is easy to sell and actually does benefit users and conversions. So I felt it is important to finally cover what is going on with INP, Interaction to Next Paint, and Core Web Vitals.

To be clear, nothing has changed yet with Core Web Vitals and INP is very much in the experimental phase. But there is a chance that INP will be added to Core Web Vital and / or replace FID in Core Web Vitals.

This was announced at Google I/O in this session at about 6 minutes in:

Michal said "FID has some fairly large blind spots." He said "and that's why we are introducing a new experimental responsiveness metric, Interaction to Next Paint. INP is a full-page lifecycle metric, just like Cumulative Layout Shift. That means it measures all interactions, not just the first. We call that runtime responsiveness to help differentiate from just loading responsiveness. INP measures the whole input latency, from when a user interacts until they actually see a visual response, not just the initial delay on main thread."

This is about making sure the web site lets you interact with it within a short period of...

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