The Messenger is The Message: How to Mobilize Customers and Unleash the Power of Advocate Marketing Consider your last big purchase: What influenced your decision? A paid advertisement? A polished press release? A celebrity Twitter endorsement? A marketing email? A product webpage? Probably not. More than likely, you listened to someone you know and trust. An authentic voice with relevant experience is the most convincing proponent when we're considering a new product or company. That is the power of an advocate.