Affiliate marketing is a performance-based marketing strategy where businesses reward individuals or companies, known as affiliates, for driving traffic or sales to their products or services. Affiliates promote these products through various channels, such as websites, blogs, or social media, and earn a commission for each sale or lead generated through their unique referral links. This marketing model benefits both parties: businesses gain exposure and sales without upfront costs, while affiliates can earn income by promoting products they believe in. It has become a popular way for individuals to monetize their online presence and for companies to expand their reach.