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 Microsoft's Bing Is a Search Portal, not a Decision Engine Filtering and Aggregation Tools Encourage Users to Stay on Site By David Berkowitz, Published on June 01, 2009 8 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.