38. The computer-readable medium of claim 36 , wherein said location record indicates that the person has tagged a shared content item, wherein said shared content item is an item that the person has shared with one or more people.
38. The computer-readable medium of claim 36 , wherein said location record indicates that the person has tagged a shared content item, wherein said shared content item is an item that the person has shared with one or more people. 39. The computer-readable medium of claim 38 , wherein said shared content item is an ad.