From LXF Wiki
Adding categories to a page
Mark a page like this:
[[Category:Help]] [[Category:LXF Wiki]]
and look at the grey bar at the bottom of the page. See, it says Categories: Help | LXF Wiki. Click the LXF Wiki link and presto! a page full of links to other pages in the LXF Wiki category. Fantastico!
Which category to choose?
Check out Special:Categories. This lists all the categories that have been created to date. If you think you need a new one, just add a link in your page to the new one. When you click the new (red) link, it will give you a page with an Edit tab so you can create the Category. Type in a few words of explanation, and Save page.
Naming Categories and pages
Page names are usually in the singular, say Console. This is because a user might be asking, "What is a 'console'"? (For more about naming pages, including exceptions to the rule, see TBD).
Category names are usually in the plural, as in. This is because the category page provides a list of consoles (and related pages).