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 P&G Learns Digital Lessons -- And That Twitter Success Brings Spambots Silicon Valley Giants Head to Cincinnati For Signal Procter & Gamble Event By Jack Neff, Published on March 08, 2012 3 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.