Announcement: I'm no longer active. My talk page is still your best bet to get in touch. —Aichon— 04:39, 15 December 2018 (UTC)
Demonstration pages that are made to stand alone and not be included elsewhere. Usually used to show off stuff, hash out ideas before they're posted elsewhere, or else provide others with a quick reference for something. They change often, hence the generic names.
Pages that are used as templates, usually in my demo pages up above. You are strongly advised NOT to include these templates in your own pages since they could change at any time and break your pages. I would also advise against watching these pages since I am unable to preview changes with them when I want to see how they look while included, meaning that I sometimes have to save dozens of edits in a row.