1) The document discusses using social analytics to demonstrate the ROI of shopper marketing by measuring the impact of word-of-mouth (WOM) promotion on social media. 2) It introduces the concepts of Authentic Reach and Authentic Influence - metrics that measure how widely and deeply brand advocates' social content spreads, and how it impacts brand awareness and follower behavior/sales. 3) These metrics provide valuable insights for shopper marketers by quantifying the real influence of social WOM promotion, helping to demonstrate the ROI of their social media strategies.