The program which is working on Amazon affiliate marketing is popularly known as Amazon Associates.

It is free of cost for both Websites owners and bloggers to work and become Amazon Associates. Once you are done, you can advertise and promote products from Amazon.com to your sites by creating links.

When the customer clicks the links than buy the products from Amazon.com the payment is credited into Amazon.com but in return, amazon associates got to know and earn referral code.

How does the Amazon Affiliate program work?

In the Amazon Affiliate program, associates earn commission by creating unique product links, promoting the links on their website, and driving referral traffic back to Amazon.

Source Link- how to start with Amazon Affiliate Marketing