Interest groups influence political decision-making by advocating for specific issues and mobilizing public opinion to sway policymakers. These groups engage in lobbying, providing information, funding campaigns, and building coalitions to amplify their voices and interests. By representing various sectors, such as business, labor, environmental, or social causes, they impact legislative outcomes and public policy. Interest groups can also raise awareness of pressing issues, facilitating dialogue between constituents and governmental representatives. Their influence underscores the importance of citizen participation in shaping political agendas and outcomes.