Using Post Categories gives a great way of differentiating content on your blog and setting the overall lockdown for posts within the category. Users can also subscribe to the blog or its specific categories by subscribing to a RSS feed.
Setting up a Post Category
Go to Posts > Categories and click the ‘Add Category’ button.
Enter in category details and the permalink (URL) to display all posts assigned to the specific category.
Choose the Lockdown & Access you wish to display your categories to. Read this article on how the Lockdowns work for posts.
Click ‘Add Category’ to continue.