Interaction to Next Paint (INP) is a new Core Web Vital metric focused on responsiveness that is scheduled to replace First Input Delay on March 4, 2023. What Is Interaction to Next Paint (INP)? INP is a metric showing the amount of time visual feedback is blocked after a user interaction. Thus, the key functionality of an INP optimization tool is to identify what’s blocking or delaying the visual feedback from a user interaction. Web Vitals Chrome ExtensionThis Chrome extension offers core web vitals metrics, including INP.