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"
“ Greetings, and welcome to the Searchengines Wiki! The ultimate search engine encyclopedia that...
Search Engines Wiki
“ The Search Engines Wiki Team is the team in charge of site maintenance and administration of the...
Search Engines Wiki Team