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 Facebook Marketing: The Four Biggest Blunders Hurting Your Brand Why You're Doing It Wrong and How to Get it Right By Cathy Halligan, Published on September 13, 2011 19 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.