Once you join an affiliate program, you get a unique link and affiliate id. This is your link, and no one else has the same link as yours; that's why generally, affiliate links are too long. For example - This is a website address - www.ezoic.com My affiliate link will be - www.ezoic.com/3uhe832d (unique link) Both links will be redirected to the same page. When someone comes from my link, the website will identify that this user comes from this affiliate id. So if the user has created an account and used the services, your affiliate id will get a commission. For example: After clicking on my link, Chris created an account, used Ezoic, and made a revenue of $1,000 in May. Per the terms, my commission will be 3% = $30. This commission will be transferred to my linked PayPal account on June 30. Similarly, I can refer to thousands of people, and if only 20 of them joined and made a revenue of $20,000, my commission would be $600.