Product features

Product features are items that provide added functionality to products on your site. These should not be confused with core product settings or attributes. Instead, features are things like the three core features of file downloads, recurring fees, and role promotions. You can technically attach any number or combination of these to a product, and they usually involve adding functionality on an individual SKU basis. To learn more about them, refer to their individual documentation pages:

File downloads
Recurring fees
Role promotions