Affiliate marketing is an Internet-based marketing practice in which a business rewards one or more affiliates for each visitor or customer brought about by the affiliate's marketing efforts.

Affiliate marketing is also the name of the industry where a number of different types of companies and individuals are performing this form of Internet marketing, including affiliate networks, affiliate management companies, and in-house affiliate managers, specialized third party vendors, and various types of affiliates/publishers who promote the products and services of their partners.

Affiliate marketing overlaps with other Internet marketing methods to some degree, because affiliates often use regular advertising methods. Those methods include organic search engine optimization, paid search engine marketing, e-mail marketing, and in some sense display advertising. On the other hand, affiliates sometimes use less orthodox techniques, such as publishing reviews of products or services offered by a partner.

Affiliate marketing—using one website to drive traffic to another—is a form of online marketing, which is frequently overlooked by advertisers. While search engines, e-mail, and website syndication capture much of the attention of online retailers, affiliate marketing carries a much lower profile. Still, affiliates continue to play a significant role in e-retailers' marketing strategies.Guide to E-Commerce Technology, 2007-08 Edition by Internet Retailer

Origin

The consensus of marketers and adult industry insiders is that Cybererotica was either the first or among the early innovators in affiliate marketing with a cost per click program.Shawn Collins (November 10, 2000), History of Affiliate Marketing, ClickZ Network, retrieved October 15, 2007

During November 1994, CDNOW launched its BuyWeb program. With this program CDNOW was the first non-adult website to introduce the concept of an affiliate or associate program with its idea of click-through purchasing. CDNOW had the idea that music-oriented websites could review or list albums on their pages that their visitors may be interested in purchasing. These websites could also offer a link that would take the visitor directly to CDNOW to purchase the albums. The idea for remote purchasing originally arose because of conversations with music label Geffen Records in the fall of 1994. The management at Geffen wanted to sell its artists' CDs directly from its website, but did not want to implement this capability itself. Geffen asked CDNOW if it could design a program where CDNOW would handle the order fulfillment. Geffen realized that CDNOW could link directly from the artist on its website to Geffen's website, bypassing the CDNOW home page and going directly to an artist's music page.Jason Olim, Matthew Olim and Peter Kent, "The Cdnow Story: Rags to Riches on the Internet", Top Floor Publishing, January 1999 ISBN 0-9661-0326-2