This document discusses using the internet and social media as communication mediums for marketing. It notes that the internet reached an audience of 50 million people within 4 years, faster than other mediums like radio and TV. Common communication mediums on the internet include email, blogs, social networks like Twitter, Facebook and LinkedIn. The document then focuses on using LinkedIn for business, outlining its targeted demographic and strategies like joining groups, using status updates, applications and event promotion to engage the LinkedIn network. The key is finding the target demographic and providing compelling, consistent content.