Affiliate marketing is when you promote other companies’ products. When someone buys through your affiliate link, you get a commission. As an affiliate, you’re a salesperson for the company. You help to make a sale, the company rewards you. The best thing about affiliate marketing is that you can do it at scale. A typical salesperson only sells products from one company. As an affiliate marketer, you can promote products from many different companies and earn commissions from all of them.