Affiliate marketing: 

In the setting of advertising, affiliate marketing refers to the practice of paying outside publications to direct customers to a company's goods and services. The commission payment encourages the affiliate third-party publishers to look for ways to advertise the business.

Awareness of affiliate marketing

Affiliate marketing has become more popular thanks to the internet. By developing an affiliate marketing program, which allows websites and bloggers to place links to the Amazon page for a reviewed or discussed product in exchange for advertising fees when a purchase is made, Amazon (AMZN) popularized the practice. The act of selling is outsourced over a wide network in affiliate marketing, so it's successfully a pay-for-performance marketing business.
Although affiliate marketing predates the Internet, it became a billion-dollar industry in the world of digital marketing thanks to analytics and cookies. An organization running an affiliate marketing program can monitor the links that generate leads and determine how many of them result in sales using internal analytics.