Campaign finance laws regulate the funding of political campaigns to promote fairness and limit the influence of money in politics. These laws set limits on how much individuals and organizations can contribute to candidates and parties. They aim to create a level playing field by preventing any single donor from having disproportionate influence over candidates or political outcomes. However, critics argue that these laws can restrict the free speech of candidates and supporters, while loopholes and super PACs may still allow wealthy donors significant sway.