If you click (like I did) on the "Moodle docs page about this" from a contextual popup (?) Help window you can wind up here.
In my case the window was about how the "short name" for a course was used. This page was empty then, so it didn't help much :-(
Unfortunately the popup window links aren't context sensitive (to the original click) so you are just wind up here. What you could try is go back to the PAGE with the (?) you clicked. Go to the Moodle Docs link for that PAGE. Hopefully that page will contain something about your question.