When there are specific categories you are particularly interested in, you can Follow them as a way to create shortcuts to your favorite places on the community, and quickly access them later, without having to navigate through the menu every time.
How do I Follow a Category?
To follow a category, click on the Notifications preferences link below the category banner and select Follow.
How to view your Followed Categories
Once followed, you can access all of your Followed categories from My Categories under the user menu in the upper right corner.