How to write/get unique descriptions for products on an affiliate website?

[Jake]

As a real store should, you might also want to add more text to the pages in the form of category introductions and how to use sort of articles, to earn more ranking and keyword matches.

You can find outsource workers who can do those rewrites for not too much money (if you have any) study a course like shortcopyformula.com (oops closed at the moment?) and you may be able to write descriptions more persuasive than the original factory text.