This panel gives you an overview of how many pages have been optimized by NitroPack.io.
You can also see how long ago a cached page has been purged, along with the reason for the last purge.
Clicking the number of optimizations gives you a breakdown of the number of cached pages for every page type - mobile, tablet, and desktop:
There are also buttons to invalidate and purge your entire site cache. To learn more about both types of cache clearing, refer to this article.