INP is the Interaction to Next Paint page speed metric, which will take the place of the First Input Delay (FID) metric in March 2024. This change is not new, announced by web.dev in May 2022, Search Engine Journal wrote about it in July 2022, and it was updated on web.dev on June 28, 2023. Without going into technical parameters — it means that the website should respond up to 0.2 seconds to user actions.