Affiliate marketing is a performance-based marketing strategy where a business rewards one or more affiliates for each visitor or customer brought by the affiliate's marketing efforts. It's a symbiotic relationship where both parties benefit: the business gets increased sales and exposure, while the affiliate earns a commission for each sale or action generated through their promotional efforts. The beauty of affiliate marketing lies in its flexibility and scalability. It's accessible to anyone with an online presence, from bloggers and social media influencers to website owners and email marketers. With the right strategies and partnerships, affiliate marketing can become a lucrative source of passive income.