Affiliate marketing is a marketing arrangement in which affiliates receive a commission for each visit, signup or sale they generate for a merchant. This arrangement allows businesses to outsource part of the sales process. It is a form of performance-based marketing where the commission acts as an incentive for the affiliate; this commission is usually a percentage of the price of the product being sold, but can also be a flat rate per referral.
Affiliate marketers may use a variety of methods to generate these sales, including organic search engine optimization, paid search engine marketing, e-mail marketing, content marketing, display advertising, organic social media marketing, and more.
Though the largest companies run their own affiliate networks (for example Amazon), most merchants join affiliate networks which provide reporting tools and payment processing.
The concept of revenue sharing—paying commission for referred business—predates affiliate marketing and the Internet. The translation of the revenue share principles to mainstream e-commerce happened in November 1994, almost four years after the origination of the World Wide Web.
The concept of affiliate marketing on the Internet was conceived of, put into practice and patented by William J. Tobin, the founder of PC Flowers & Gifts. Launched on the Prodigy Network in 1989, PC Flowers & Gifts remained on the service until 1996. By 1993, PC Flowers & Gifts had generated sales in excess of $6 million per year on the Prodigy service. In 1998, PC Flowers and Gifts developed the business model of paying a commission on sales to the Prodigy Network.
In 1994, Tobin launched a beta version of PC Flowers & Gifts on the Internet in cooperation with IBM, which owned half of Prodigy. By 1995 PC Flowers & Gifts had launched a commercial version of the website and had 2,600 affiliate marketing partners on the World Wide Web. Tobin applied for a patent on tracking and affiliate marketing on January 22, 1996, and was issued U.S. Patent number 6,141,666 on Oct 31, 2000.