Welcome to the wide world of affiliate marketing! So, what is an affiliate and what does he or she do? The affiliate marketer acts as a “middle man” between merchant and consumer,but without adding anything to the consumer’s cost.Affiliates do not mark up or resell products. Instead, the affiliate educates and directs the consumer to a product, and they receive a percentage of the sale in commission from the merchant. The affiliate acts as an independent lead generator for the merchant by bringing in new customers. This is a win-win situation for both the affiliate and the merchant.