Social networks are not channels for advertisers or for the adverts/memes you, your clients or any of your so-called "influentials" create, social networks are for all of the people who participate in the network.
Being a social creature means you spend your life in social networks; being part of a social network gives each individual a number of benefits – shared protection, shared resources and most importantly shared learning. Our ability to learn from each other (the appropriately-named Social Learning) is one of our all-too-mutual species' most characteristic capabilties and the engine by which stuff gets pulled through populations (from technologies to health habits)
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Social networks are not best understood as channels down which folk send things; social networks are webs from which members pull down learning (from each other).
via herd.typepad.com
one for all my marcomms friends 🙂