Patent ID: 8554629

Claim:
A computer-implemented method for providing advertising on a website, comprising: obtaining purchase information submitted by a user acting to make a purchase on the website, wherein the purchase information includes information about a product or service that the user has acted on to purchase and is obtained at a point in time after checkout and prior to a purchase confirmation message being provided for display to the user; using the purchase information of the purchase, determining, by one or more computer systems, at least one advertisement for an unpurchased product or service related to the product or service that the user has acted on to purchase and having a different type than the product or service that the user has acted on to purchase, wherein the determining the at least one advertisement comprises comparing the purchase information to previous purchases made at the website or at third-party websites; and providing the at least one advertisement for display on the website to the user when the purchase confirmation message is presented to the user.