Interest groups advocate for policy changes by employing strategies such as lobbying, grassroots mobilization, and public campaigns to influence decision-makers. They represent specific interests—be it business, environmental, or social—and seek to align legislation with their goals. By providing research, funding, and mobilization efforts, interest groups can significantly impact policymakers and shape public opinion. They often engage in coalition-building to strengthen their influence, enhancing their ability to advocate effectively. However, their impact raises questions regarding democratic representation and potential inequities in political power.