NitroPack is only active on the pages you select in this panel.

Using the button Include Page Type, you can activate NitroPack on a custom route, which may come with a 3rd party extension (for example, a Blog).

Using the Invalidate and Purge buttons, you can clear your cache only for a specific OpenCart route:

To learn about the difference between Invalidate and Purge, refer to this article.