| 摘要 |
An entity provides a competitive block list for one or more of its objects in a social networking system. The competitive block list identifies advertisers or other entities prevented from targeting advertisements based on connections between users and objects of the entity. If a later received advertisement is targeted based on a connection between a user and an object of the entity, the social networking system determines whether the advertiser associated with the advertisement is included on the competitive block list. If the competitive block list includes the advertiser, the advertisement is determined not to be valid, and not presented to users. Otherwise, the advertisement is determined to be valid, and may be presented to users thereafter. |
