Public interest groups play a crucial role in advocacy by representing the interests of marginalized populations, promoting social causes, and influencing policymakers. These groups inform citizens about critical issues, mobilize community support, and lobby government officials to enact favorable legislation. By conducting research, disseminating information, and organizing campaigns, public interest groups help shape public discourse and hold institutions accountable. Their efforts encourage greater civic participation and foster a sense of responsibility among citizens to advocate for their rights, thereby enhancing democratic engagement and contributing to a more responsive political system.