Usually, after you choose a product from an associate degree affiliate program purchasable, the vendor can offer you a novel affiliate code, that you'll use for your traffic and target website. Most affiliate programs will usually give you text links, banners and forms, where you will have to put in your own code and give your own website address through which you will drive traffic. Then it is usually seen that when the interested buyers click on the link provided on your site, they automatically go to the product site and if they buy the product or visit their website i.e. the product site that you have affiliate, you will get commission according to the agreement. Hope you understand.