The significance of political speech as a form of expression lies in its role in a democratic society. It enables individuals to share their opinions, advocate for change, and engage in critical discussions about governance. Political speech is protected under the First Amendment in the U.S., highlighting its importance in fostering an informed citizenry and allowing for dissent. This form of expression can influence public policy and drive social movements, making it crucial for a functioning democracy. Moreover, it promotes accountability among leaders and encourages participation in the political process.