Affiliate marketing is a marketing practice in which a business rewards one or more affiliates for each customer brought about by the affiliate's own marketing efforts. To make money with affiliate marketing, one can sign up as an affiliate with a company and promote their products through a unique affiliate link. When a customer makes a purchase through the affiliate link, the affiliate earns a commission. It is important to understand the product and target audience, choose appropriate affiliate programs, and use effective marketing strategies to drive traffic and sales.