The document summarizes the origins and growth of Facebook from its founding in 2004 by Mark Zuckerberg at Harvard for students, to becoming a global social network. It notes that in 2007, Microsoft purchased 1.6% of Facebook for $240 million, valuing Facebook at $15 billion. The document also briefly discusses Facebook's revenue model of advertising, privacy issues and lawsuits, and how the site allows illusion of celebrity and connection for users.