Affiliate marketing is a business model where individuals or companies promote someone else’s products or services and earn a commission for every sale or action generated through their unique link. It’s popular because it allows people to make money without creating their own products, managing inventory, or handling customer service. For businesses, it’s equally beneficial since they only pay for actual results, making it a low-risk, high-reward way to reach new customers. Overall, affiliate marketing is a flexible, win-win setup that helps both marketers and companies grow.