Final answer:
Super PACs are fundraising groups that can raise unlimited funds to advocate or support political candidates. They cannot contribute directly to candidates, but they can spend independently of a campaign or party.
Step-by-step explanation:
Super PACs are fundraising groups that can raise and spend unlimited funds to advocate or support political candidates. Unlike regular PACs, super PACs are not bound by restrictions on the amount of money they can raise. They cannot contribute directly to candidates, but they can spend independently of a campaign or party. This was made possible by the Supreme Court ruling in Citizens United v. Federal Election Commission in 2010, which determined that limiting independent political spending violates the First Amendment right to free speech.