Affiliate marketing can best be described as a kind of performance-based marketing in which a business rewards its marketing affiliates for every visitor or customer brought to its website as a result of the affiliate’s marketing efforts. In other words, a company will provide an affiliate with commission in exchange for promoting its products or services. The affiliate might, for example, post an ad leading to the company’s website on his or her blog. For every visitor that ends up on the company’s website via that ad, the affiliate gets paid a set amount. This means that businesses only pay for results, giving affiliate marketing an unusually high ROI.