The document discusses how Barack Obama successfully leveraged social media in his 2008 presidential campaign. It describes how his campaign used platforms like YouTube, Facebook, and Twitter to share its message, organize supporters, fundraise, and ultimately engage more voters than previous campaigns. The use of new media helped Obama connect directly with constituents, lower costs, and empower grassroots supporters to take ownership over the campaign. This level of online participation and continual engagement after the election represented a significant change from previous top-down campaign models.