When you upload a template, you need to add a category for that template.

There is no restriction on how many or what you call your categories, however there are some tricks to know:

Sale, sold, rent and rented

If you use these categories when adding templates for these listing types, then by default, when you go to share the listing type, these templates will be shown. For example, if you select to share a sold listing, all templates in the sold category will be shown first.

Template Background

You may be creating backgrounds for your dynamic templates. You can upload these backgrounds into your templates as they need to be available online for the dynamic templates. 

So that you dont get a lot of template backgrounds showing up when you go to apply your dynamic templates (such as when you go to share a listing), if you add them to the 'Template Background' category, they will not show up.