The main differences between FID and INP include the following

[samiaseo222]

FID measures the time from the moment a user first interacts with a page (click, tap, etc.) to the moment the browser can respond to the event handlers of that interaction, focusing only on the first input during page load and serving to quantify the user's first impression of the interactivity and responsiveness of the site.

In contrast, INP quantifies the time from all germany phone number data user interactions (clicks, taps, and keystrokes) to the next visual feedback frame being rendered, taking into account all interactions throughout the page's lifecycle, not just the first input during loading. It is intended to assess the overall responsiveness of a page to inputs.

An INP value of 200 milliseconds or less indicates good response. Anything above this value requires improvement.

Evidence for Core Web Vitals as a Ranking Factor
In 2020, Google Search Central pre-announced signals for evaluating upcoming page experience metrics (Core Web Vitals).

The relevant blog post stated the following:
Earlier this month, the Chrome browser team announced Core Web Vitals, a set of metrics related to speed, responsiveness, and visual stability designed to help website owners measure the user experience on the web.

Today, we're building on that work by providing a preview of an upcoming search ranking change that includes these page experience metrics.