To add a new category to a page you can click the Category button at the bottom of the page and type in the name you'd like your category to be called.
A full list of existing categories can be found at Special:Categories.
Pages in category "Browse"
“ Polls are surveys displayed around the wiki. Anyone can participate, including anonymous users...
“ There are a few, special cases that The Simpsons: Tapped Out Wiki speedily deletes articles or...
Category listing Categories
“ Different users have access to different functions of the site. While anyone can do most things...