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 Consumer-Written Product Reviews Increase in Importance More Online Shoppers Demand Them; Analysts Cite Their Growing Marketing Impact By Matthew Creamer, Published on August 28, 2006 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. Register Now Already a member? Log in.