An affiliate program is a profit-sharing program that companies operate to increase revenue. It is a low-cost and low-risk program to invest in. A typical affiliate program pays referral fees or commissions to its affiliates when they refer a successful sale through their specially tracked affiliate links. When the affiliate reaches the payment threshold, they get a payout from the company for all of their qualifying commissions. Most large companies have affiliate programs including Amazon, Target, Walmart, Chewy, Home Depot, Etsy, eBay, and many more.