Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, are described for providing content. A method includes: receiving a request for an advertisement to be displayed in a slot associated with a third-party content site; identifying a relevant advertisement to be provided in the slot; determining information to be included in an annotation associated with the advertisement, the annotation including customized information related to a user or a group associated with the user that is to be presented along with the advertisement; providing the advertisement responsive to the request including providing the annotation along with a control for re-publishing the advertisement along with the relevant advertisement; receiving user input selecting the control and designating the advertisement for re-publishing; and targeting additional content to the user or a group associated with the user based on the received user input.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, for providing a method that includes receiving an indication from a user to promote an item that is included in an activity stream associated with the user, the activity stream being presented in a social context by a social application; receiving a request for an advertisement; determining the item is responsive to the request; determining one or more advertisements responsive to the request; ranking the item and the one or more advertisements; and providing the item in response to the request rather than the one or more advertisements and based at least in part on the rankings.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, are described for providing content. A method includes: receiving a request for an advertisement to be displayed in a slot associated with a third-party content site; identifying a relevant advertisement to be provided in the slot; determining information to be included in an annotation associated with the advertisement, the annotation including customized information related to a user or a group associated with the user that is to be presented along with the advertisement; providing the advertisement responsive to the request including providing the annotation along with a control for re-publishing the advertisement along with the relevant advertisement; receiving user input selecting the control and designating the advertisement for re-publishing; and targeting additional content to the user or a group associated with the user based on the received user input.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, for providing a method that includes receiving an indication from a user to promote an item that is included in an activity stream associated with the user, the activity stream being presented in a social context by a social application; receiving a request for an advertisement; determining the item is responsive to the request; determining one or more advertisements responsive to the request; ranking the item and the one or more advertisements; and providing the item in response to the request rather than the one or more advertisements and based at least in part on the rankings.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, for providing a user interaction point on a user device in conjunction with content that is provided by a content publisher. A method includes receiving a request for an advertisement to be displayed in a slot associated with a third-party content site; identifying a relevant advertisement to be provided in the slot; determining information to be included in an annotation associated with the advertisement, the annotation including customized information related to the user or a group associated with the user; and providing the advertisement responsive to the request including providing the annotation for presentation along with the relevant advertisement.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, for providing a user interaction point on a user device in conjunction with content that is provided by a content publisher. A method includes receiving a request for an advertisement to be displayed in a slot associated with a third-party content site; identifying a relevant advertisement to be provided in the slot; determining information to be included in an annotation associated with the advertisement, the annotation including customized information related to the user or a group associated with the user; and providing the advertisement responsive to the request including providing the annotation for presentation along with the relevant advertisement.