It’s rare, but sometimes there are URLs that the site needs but Mindspun can’t find on its own.
The additional URLs setting allows you to add URLs manually to ensure they are crawled each time. The URLs are treated as if they are referenced by an anchor href attribute.
URLs are specified as a list:
[ "/a", "/b" ]
It’s okay to specify a URL in the list that is otherwise found (but you don’t need to).