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"
“ What is B.A.S.S, you ask? B.A.S.S stands for Bad Article Search Squad and it's a group of...
“ This is an example of a talk page made after message walls were implemented.|<>| The Reclamation...