The person who manages an affiliate program for a merchant. They are responsible for affiliate recruitment, ensuring that the affiliates are using above board promotional methods and for increasing affiliate sales for the merchant. They also act as the liaison between the affiliate and the merchant. The affiliate manager may work directly for the merchant or be an independent service provider contracted by the merchant to run their affiliate program. Also referred to as an OPM.
A practice that underhandedly deposits cookies from merchants onto users computers when the user has never visited the merchant through the affiliate's link and potentially may not have even the affiliate's website. Cookie stuffing is done with the intent of stuffing as many cookies as possible onto as many user computers as possible in the hopes that they eventually come accross the merchant website and make a purchase. The larger and broader the merchant, the more likely that is to occur (think Amazon). Cookie stuffing is heavily looked down upon by legitimate affiliates and most merchants ban affiliates using cookie stuffing in their affiliate agreements.
Since you are going to do a lot of product reviews and recommendations, you are going to have to pick a topic that you have the passion for or something you have a wide knowledge of. If your passion is not within that topic, then you are likely to lose interest eventually. Therefore, it is pertinent to choose something of your interest. You can also find content writers and reviewers from Upwork or Fiverr!
Perhaps most importantly, though, successful affiliate marketing on Amazon is built on the same foundational principle that all affiliate marketing, and all online marketing and business, is based: trust. In the end, Amazon is another tool that helps you help your audience and build their trust further, by promoting products that will help them achieve their goals.
You should also make sure you aren't competing with your own affiliates for eyeballs. Any marketing channels you're using, such as search engines, content sites or e-mail lists, should be off limits to your affiliates. Put marketing restrictions into your affiliate agreement and notify partners immediately. It's your program--you set the rules. Or, if you prefer, you can let your affiliates run the majority of your internet marketing.