Amazon Publisher Direct is an invitation-only display ad program for high quality publishers and bloggers. Bloggers/Publishers are paid a guaranteed monthly CPM for showing display ads from Amazon and other branded advertisers on their websites. The program allows you to maximize your display ad revenues by setting a minimum CPM for each ad slot. Amazon will only serve an ad if they can meet or beat your minimum CPM rate on a monthly basis. If Amazon does not have a relevant ad or cannot meet the minimum CPM you set on a monthly basis, your ad request will be passed back to an ad network of your choice. Amazon Publisher Direct can be used along with your existing ad networks. The ads are high-quality and relevant to your website visitors.