Input Block Time works similarly to the metrics above. It measures the amount of time between the first content rendering and the time to interactivity. In general, if the browser's main thread doesn't encounter a long-running task for 5 seconds, then TTI kicks in.
Both of these metrics are closely related, it is impossible to use one without taking into account the other. This metric is what allows the TTI indicator to provide an exclusively correct situation of user interaction.
Methods for improving TBT include reducing the number of requests and the size of thailand rcs data third-party scripts, as well as minimizing the amount of browser work in the main thread.
You can also clean up any unused JavaScript and CSS code, and don't forget to always compress and minify your JS and CSS files.