If you want to comment on something on a page, but you don't want simply to change the page (which, of course, you can do!), then put a line, indicated with four hyphens in a row, like this:
and add your remarks below the line, at the bottom of the page. This, anyway, is a nice convention to follow. In principle, there's nothing stopping you from adding your remarks anywhere.
Click "Edit text of this page" below to see how this was done...the four hyphens will be revealed.
By the way, you can participate on
WikipediaL if you want to discuss something that, for whatever reason, you don't want to discuss on Wikipedia itself.