A super PAC, or "political action committee," is an organization that can raise and spend unlimited amounts of money to support or oppose political candidates. Unlike traditional PACs, super PACs are not allowed to coordinate directly with candidates or their campaigns. They often focus on advertising and other forms of communication to influence voters. Super PACs emerged after the 2010 Supreme Court decision in Citizens United v. FEC, which ruled that spending money to influence elections is a form of protected free speech. This has led to significant financial contributions from individuals, corporations, and unions, impacting the political landscape in the United States.