The document discusses the evolution of the internet and rise of social media. It notes that internet usage has grown from static web pages to over 550 million people online. Social networks and user-generated content have become prominent. Examples of social networks mentioned include Facebook, LinkedIn, and Hyves. The document also discusses how businesses can leverage social media for customer engagement and reviews. It provides examples of how the Dutch hospitality industry utilizes social platforms like Twitter, blogs, and review sites.