The document discusses the concept of Enterprise 2.0 and social networks within organizations. It identifies four trends driving the adoption of social media technologies in enterprises: 1) the rise of social networks and their ability to change knowledge sharing; 2) consumer web applications being used in enterprises; 3) the rise of user-generated content; and 4) changing demographics of employees. It argues that implementing social media on internal networks (intranets) can help capture tacit knowledge, improve collaboration, and address issues around an aging workforce.