The Internet has increased the prominence of affiliate marketing. Amazon popularized the practice by creating an affiliate marketing program whereby websites and bloggers put links to the Amazon page for a reviewed or discussed product to receive advertising fees when a purchase is made. In this sense, affiliate marketing is essentially a pay for performance marketing program where the act of selling is outsourced across a vast network.
A more complex system, pay per lead affiliate programs compensates the affiliate based on the conversion of leads. The affiliate must persuade the consumer to visit the merchant’s website and complete the desired action — whether it’s filling out a contact form, signing up for a trial of a product, subscribing to a newsletter, or downloading software or files.