If you're an affiliate marketer, you've probably been told many times that it's not necessary to have a website to promote other people's products online. You're told to set up links and banners and write ads using pay per click methods to promote websites. Most of the time, you bring people to the merchant's website via your own affiliate link and hope that they will buy from your link the first time they see the product. However, doing this puts you at a huge disadvantage. There are 5 reasons why.