Abstract: Described are methods, systems, and apparatus, including computer program products for domain selection for advertisement data in the delivery of website display ads. A request is received from a requester for indicia of one or more impression opportunities. A redirection URL and redirection type is received. One or more desired impression opportunities are determined. The indicia of the one or more impression opportunities are generated comprising indicia of the one or more desired impression opportunities. Redirection instructions are generated based on the redirection URL and redirection type. The indicia of the one or more impression opportunities and the redirection instructions are sent to the requester.

Abstract: Described are methods, systems, and apparatus, including computer program products for auctioning webpage display ads. A first request is received from a requester loading a first webpage for indicia of one or more impression opportunities. A second request is sent to a plurality of third parties for one or more bids for a first impression opportunity. Whether to select the first impression opportunity is determined based on the one or more bids received from one or more of the plurality of third parties. If the first impression opportunity is selected: first ad information is stored; the indicia of one or more impression opportunities are generated; the indicia are sent to the requester; a third request is received from the requestor for an ad to populate the first impression opportunity on a second webpage, the request including indicia of one or more ad buyers; and a first ad is sent.

Abstract: Described are methods, systems, and apparatus, including computer program products for domain selection for advertisement data in the delivery of website display ads. A request is received from a requester for indicia of one or more impression opportunities. A redirection URL and redirection type is received. One or more desired impression opportunities are determined. The indicia of the one or more impression opportunities are generated comprising indicia of the one or more desired impression opportunities. Redirection instructions are generated based on the redirection URL and redirection type. The indicia of the one or more impression opportunities and the redirection instructions are sent to the requester.