"Gossip has been researched in terms of its evolutionary psychology origins. This has found gossip to be an important means by which people can monitor cooperative reputations and so maintain widespread indirect reciprocity. Indirect reciprocity is defined here as "I help you and somebody else helps me." Gossip has also been identified by Robin Dunbar, an evolutionary biologist, as aiding social bonding in large groups.”
I can also see how gossip can be used as an effective diversionary tactic to draw focus away from other areas of importance by manipulating our natural desire to socially immerse. With gossip, we can be kept incognizant of issues that adversely effect us, but are beneficial to those enacting the diversion, but I digress...that subject is for another post (but you didn’t hear that from me).