Translations:Understanding categories and articles/8/en
From Joomla! Documentation
List and Blog Layouts
First, there are built-in Menu Item Types in Joomla! that take advantage of this organization: Category Blog and Category List. These Menu Item Types (also called "layouts") make it very easy to show articles that belong to certain categories. As new articles are created and assigned to categories, they will be automatically placed on these pages according to the parameters you set for each page.