How to Use WordPress Categories to Organize Your Content
In WordPress, a category is what you determine to be the main topic of a blog post. By using categories on your WordPress blog, 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 can display the list of categories you set up 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 by using the Categories widget included in your WordPress installation. A reader can click any category to open a page on your site that lists the posts you 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. In your WordPress Dashboard, on the Manage Categories page, subcategories appear directly below the main category. Here’s an example:
Books I Enjoy (main category)
Trashy romance (subcategory)
For Dummies (subcategory)
You can create as many levels of categories as you like. For example, Biographies and For Dummies could be subcategories of Nonfiction, which is a subcategory of the Books category. You aren’t limited to the number of category levels you can create.