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"
“ Welcome to Rage Face Wiki! We are glad to have you here! If you want to help this wiki, go ahead...
Rage Face World
“ Profanity, exceptions which can offend people, assertion of superiority over others based on...
Constitution of Rage Face Wiki