You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Why Ad Agencies Should Own Social Media It Shouldn't Be a Silo, Right? So Who Better to Handle It? By Tom Martin, Published on October 13, 2010 28 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.