This document discusses measuring social media for customer retention. It introduces the challenge of showing how social media impacts customer relationships and the need to provide accountability for social media spending. It recommends focusing the social media measurement dialogue on true business metrics like customer retention, revenue, and cost. The document reviews core measurement philosophies and explains how customer retention fits within the sales funnel. It discusses measuring customer revenue by looking at average spending per transaction and purchase frequency for social media customers versus a control group. Finally, it notes that the conversation is not just about increased revenue but also customer loyalty and lifetime value.