The document discusses the evolution of the World Wide Web and Web 2 tools. It describes how Web 1 focused on building the initial infrastructure and commercialization of the web. Web 2 is characterized by social networking sites, wikis, blogs, and real-time communication that allow for greater information sharing, collaboration, and communication between users through new applications and the emergence of mobile devices. Key Web 2 applications mentioned include social media sites, video/photo sharing, podcasts, collaboration tools, and RSS feeds which enable distribution of regularly updated content from various online sources.