The document discusses the evolution of social networks and their use in business. It notes that while early social networks like MySpace and Bebo saw declining user bases, social networking at businesses is on the rise. The document outlines how businesses are finding value in social networks by using analytics to identify influencers within their networks and measure the impact of viral marketing campaigns. It provides examples of how identifying influencers can boost content downloads and product adoption among both influencers and their followers.