You can create unlimited Categories for your product. Always name Categories correctly and avoid duplication of Categories, which helps prevent future problems. Click + Create New Category to create a new category.
The list of Products found on your Category list are predefined subscriptions only. This is not necessarily reflective of your current subscription.
You can choose any Banner style that you need. Regardless of your industry, you can select a Banner style that you think is best. You just need to make a few changes to get the style and design of the banner that you need.