Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for providing content. A first call for content to be published on a resource associated with a publisher is received from a requesting device. A determination is made when the publisher has authorized additional content item calls to be automatically generated responsive to receipt of the first call. A first content item responsive to the first call is determined. A message including call parameters is generated that define publisher or serving system criteria for the additional content items. The first content item and message responsive to the first call are provided. A second call for content, in conformance with the call parameters, is received after processing the message. A second different content item that is responsive to the second call is provided for publication on the resource along with the first content item.

Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for providing content. A first call for content to be published on a resource associated with a publisher is received from a requesting device. A determination is made when the publisher has authorized additional content item calls to be automatically generated responsive to receipt of the first call. A first content item responsive to the first call is determined. A message including call parameters is generated that define publisher or serving system criteria for the additional content items. The first content item and message responsive to the first call are provided. A second call for content, in conformance with the call parameters, is received after processing the message. A second different content item that is responsive to the second call is provided for publication on the resource along with the first content item.

Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for providing content. A first call for content to be published on a resource associated with a publisher is received from a requesting device. A determination is made when the publisher has authorized additional content item calls to be automatically generated responsive to receipt of the first call. A first content item responsive to the first call is determined. A message including call parameters is generated that define publisher or serving system criteria for the additional content items. The first content item and message responsive to the first call are provided. A second call for content, in conformance with the call parameters, is received after processing the message. A second different content item that is responsive to the second call is provided for publication on the resource along with the first content item.

Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for providing content. A first call for content to be published on a resource associated with a publisher is received from a requesting device. A determination is made when the publisher has authorized additional content item calls to be automatically generated responsive to receipt of the first call. A first content item responsive to the first call is determined. A message including call parameters is generated that define publisher or serving system criteria for the additional content items. The first content item and message responsive to the first call are provided. A second call for content, in conformance with the call parameters, is received after processing the message. A second different content item that is responsive to the second call is provided for publication on the resource along with the first content item.

Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium for measuring lift. A method includes: receiving requests for content for which a first content item is an eligible content item; delivering the first content item along with a first pixel that identifies the delivery of the first content item to a first portion of the received requests; delivering a second, different content item along with a second pixel that identifies the non-delivery of the first content item to a second portion of the received plurality of requests rather than the first content item; evaluating searches performed by users that received the first content item as compared to users that received the second content item including using the first pixel and second pixel in evaluating search logs associated with search requests performed by users; and presenting lift data to a sponsor associated with the first content item.

Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for providing content. A request is received for an advertisement for presentation in a slot. The request includes selection criteria. At least one selection criterion indicates a preference for display advertisements. Using the selection criteria, without regard for the preference, candidate advertisements are identified from an inventory that includes both display and other types of advertisements. An auction is conducted, including the identified candidates, determining a winning bid. A type of advertisement for the winning bid is determined. When the winning bid is associated with a display advertisement, a display advertisement is provided.

Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for providing content. A first call for content to be published on a resource associated with a publisher is received from a requesting device. A determination is made when the publisher has authorized additional content item calls to be automatically generated responsive to receipt of the first call. A first content item responsive to the first call is determined. A message including call parameters is generated that define publisher or serving system criteria for the additional content items. The first content item and message responsive to the first call are provided. A second call for content, in conformance with the call parameters, is received after processing the message. A second different content item that is responsive to the second call is provided for publication on the resource along with the first content item.

Abstract: Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium for measuring lift. A method includes: receiving requests for content for which a first content item is an eligible content item; delivering the first content item along with a first pixel that identifies the delivery of the first content item to a first portion of the received requests; delivering a second, different content item along with a second pixel that identifies the non-delivery of the first content item to a second portion of the received plurality of requests rather than the first content item; evaluating searches performed by users that received the first content item as compared to users that received the second content item including using the first pixel and second pixel in evaluating search logs associated with search requests performed by users; and presenting lift data to a sponsor associated with the first content item.