The document discusses the history and growth of Twitter. It provides statistics about Twitter usage from 2006 to 2011 that show massive growth, from just 20,000 tweets per day in 2007 to over 50 million tweets per day by 2010. The document also outlines some new features Twitter introduced in 2010, including allowing over 70,000 registered applications on the platform. Students are assigned to create a Twitter account, follow classmates, download the mobile app, and tweet a message with the #COM280 and @giorgiotedx tags asking a question.