In affiliate marketing, programs are run on affiliate networks. Networks help affiliates register and apply to individual programs and act as the trusted intermediary between affiliates and merchants. For example, networks host the merchants' creative (banners, links, etc.), handle all tracking and reporting, and automatically pay out commissions to affiliates based on the rules set by the merchant. The network uses cookies to track a customer's progress from the affiliate's blog/website (or multiple affiliates' websites) through the merchant's shopping cart. The network then automatically pays out commissions to affiliates based on the rules set by the merchant. A few of the most common affiliate networks are ShareASale, Commission Junction, ImpactRadius and Rakuten Linkshare.