The document discusses the evolution of communication tools from traditional methods like letters and faxes to modern social media platforms. It provides an overview of various Web 2.0 technologies like blogs, wikis, social networking sites and how these allow for greater information sharing and collaboration. The document also outlines benefits of using social media for businesses, including increased online engagement and new opportunities for marketing, PR and events. It concludes by recommending that companies start using these tools gradually and manage social media efforts properly.