Subcategories are the categories within a Category. They are used to further organize materials into narrower content structures.
To create a subcategory, click on the main category that you want to create a subcategory for:
This will take you to a page that allows you to add a subcategory:
Populate your subcategory with the name, a thumbnail (optional), and any localization that you may require:
Tap "Save" when done.
Repeat this process to create multiple subcategories within a category.