They show you a list of products you wish to promote. And the one's which you are interested in, you copy and paste a special URL you are given for that product, along with other information about the product onto a form.

Then once your form is submitted you wait for people to show interest in your advertisement, and this could take upto days. And remember even if someone does click on the URL and go the website your URL is promoting, they still might not end up buying the product. If someone by chance does buy the product, and they are somehow able to find out it was your URL they clicked then you get some of the share or profit. It is not like you are buying shares for the website and each time the website gets a customer you get a share of the profit. It is not like buying stocks. They have to click on the URL that was especially assigned to you. — This is what I think from having tried the program myself.