Interaction to Next Paint (INP) assesses the responsiveness of web pages to user interactions before the next visual update.
Interaction to Next Paint (INP) is a new performance metric that measures the latency of user interactions on web pages. Unlike FID, which only tracks the first interaction, INP evaluates the responsiveness of the page to all interactions leading up to the next visual update. A low INP score indicates a more responsive page, ideally under 200 milliseconds. This metric is particularly useful for dynamic, interactive web applications where multiple interactions are common.
INP is vital for SEO as it reflects how well a site handles user engagement. A lower INP can lead to a better user experience, keeping visitors on your site longer and reducing bounce rates. As part of Google's Core Web Vitals, INP can impact search rankings, making it essential for webmasters to optimize.
For instance, if a user clicks a dropdown menu and the next visual update occurs after 250 milliseconds, your INP score is 250ms. You can measure INP using tools like Web.dev's INP tool.
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