Thank you. That can be a guide for for the Nop marketplace for creating new categories (such as "Discounts", "Filter", "Chats", etc.) and or product tags to the extensions.
Meanwhile it is advisable that developers include the corresponding tags in the short description, since it is searchable.
It has been more than a year since this list was updated. NopCommerce popularity has increased a lot during this time. Can we again get an updated list sometime?