Affiliate marketing is a performance-based online marketing strategy in which businesses reward affiliates for driving traffic to their websites or generating sales or leads. In this model, affiliates, who can be individuals or companies, promote the products or services of a business through various online channels. Affiliates earn a commission for each customer or lead they bring in through their marketing efforts. This method allows businesses to expand their reach and sales by leveraging the marketing efforts of affiliates, who, in turn, have the opportunity to earn income through successful promotions.