Categories are used to group blog posts on your blog together according to similar content. This aids in better navigation of your blog site.
When you have completed your blog post, you can choose to categorize your specific post. This screenshot below will show you where to find the “Categories” section within a blog post:
To create a category, you can select the “Add New Category” linkand type your desired category label in the first box.
Here you also have the option to make this its very own category, or add it as a sub-category in an existing category (called the "Parent Category").
You can do this by using the drop-down menu.
You can also add a category from the dashboard menu by selecting “Categories”, which is listed under “Posts”, as shown below.