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 Eats Away At Google's Share Of Mobile Ad Pie Overall Revenues To Hit $31 Billion This Year, And Facebook Is Set To Claim Nearly A Quarter By Mark Bergen, Published on March 19, 2014 0 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.