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 How Google Became a $2 Billion Advertiser Search Leader and Three Other Rulers of the Internet Domain Are Now Among Biggest Ad Spenders By Bradley Johnson, Published on June 25, 2012 2 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.