How to Use Categories to Organize Your WordPress Content
In WordPress, a category is what you determine to be the main topic of a blog post. Through the use of categories, you can file your blog posts into topics by subject. To improve your readers’ experiences in navigating through your blog, WordPress organizes posts by the categories you assign to them.
Visitors can click the categories they’re interested in to see the blog posts you’ve written on those particular topics. You should know ahead of time that the list of categories you set up is displayed on your blog in a few different places, including the following:
Body of the post: In most WordPress themes, you see the title followed by a statement such as Filed In: Category 1, Category 2. The reader can click the category name to go to a page that lists all the posts you’ve made in that particular category. You can assign a single post to more than one category.
Sidebar of your blog theme: You can place a full list of category titles in the sidebar. A reader can click any category and arrive at a page on your site that lists the posts you’ve made within that particular category.
Subcategories (also known as category children) can further refine the main category topic by listing specific topics related to the main (parent) category. On your WordPress Dashboard, on the Manage Categories page, subcategories are listed directly below the main category. Here’s an example:
Books I Enjoy (main category)
Trashy romance (subcategory)
For Dummies (subcategory)