This page contains guidance on the proper use of the categorization function in Wikipedia. The central goal of the category system is to provide navigational links to pages in Wikipedia, in a hierarchy of categories which readers, knowing essential—defining—characteristics of a topic, can browse and quickly find sets of pages on topics that are defined by those characteristics.

For proposals to delete, merge, or rename categories, follow the instructions at Categories for discussion. Please use it before undertaking any complicated re-categorization of existing categories or mass creation of new categories.