Barack Obama's 2008 presidential campaign effectively utilized social media to engage voters in unprecedented ways. Obama's team posted more varied content across more online platforms than John McCain's campaign. This included over 1,800 videos on YouTube compared to McCain's 330. Obama also followed all Twitter users who followed him. His social media presence helped raise over $300 million of the $650 million total for his campaign. Lessons from Obama's success include engaging voters where they are online, being transparent and authentic, and using familiar tools to lower barriers to participation.