AI overview
I appreciate your request, but I don't actually have the context from a "Help:Category" page to base this on. You've indicated there's a Wikimedia help page I should reference, but the actual content of that page wasn't provided in your message. Could you share the text from the Help:Category page so I can write an accurate overview based on it?
AI-generated from the Wikipedia summary — may contain errors.
Article
Categories are intended to group together pages on similar subjects. They are implemented by a MediaWiki feature that adds any page with a text like [[Category:XYZ]] in its wiki markup to the automated listing that is the category with name XYZ. Categories help readers to find, and navigate around, a subject area, to see pages sorted by title, and to thus find article relationships.
Categories are normally found at the bottom of an article page. Clicking a category name brings up a category page listing the articles (or other pages) that have been added to that particular category. There may also be a section listing the subcategories of that category. The subcategorization feature makes it possible to organize categories into tree-like structures to aid navigation.