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"
“ Hi :BlackBlizzardBlinging, I'm an admin for the Quotev Wiki community. Welcome and thank you for...
“ This category may include pages and subcategories related to the active contributors to the...