An affiliate network is a platform that connects businesses, known as merchants, with individuals or companies, called affiliates, who promote their products or services. Affiliates earn a commission for each sale or lead they generate through their marketing efforts. This arrangement allows merchants to expand their reach without upfront advertising costs. These networks provide tools and resources for both merchants and affiliates, such as tracking software and payment processing. Popular affiliate networks include Amazon Associates and ShareASale. By joining an affiliate network, affiliates can access a variety of products to promote, while merchants can tap into a broader audience.