For example, on this page:
https://en.wikipedia.org/w/index.php?title=Dash&action=edit
there's a row of hotlinked characters to the right of the "Insert" pull-down that looks like this:

– — ° ′ ″ ≈ ≠ ≤ ≥ ± − × ÷ ← → · §

Hovering over any of them produces a pop-up with the text "Click on the character or tag to insert it into the edit window".

The idea of this task is to include the name of the character itself in the popup. This would make it a lot easier, for example, to tell the difference between an endash, a minus sign, and an emdash, which look very similar in certain fonts.