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 What's a 'Like' Worth? Ask Facebook's Graph Search Facebook Search Graph Optimization Becomes As Important As Google SEO By Clara Shih, Published on February 14, 2013 12 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.