The document discusses the evolution of the intranet from version 1.0 to version 2.0, known as the social intranet. It provides examples of features included in different versions such as a welcome page, bulletin board, corporate newsletter, and help desk. The social intranet incorporates social media features and allows for greater participation, transparency, and user rights. Studies show the most popular social media tools on intranets are instant messaging, blogs, forums, wikis, and user commenting. Advantages of the social intranet include improved communication, knowledge sharing, and innovation. Key factors for successful implementation include understanding user needs, clear goals, technical considerations, and community growth.