The concept of public interest is significant in policymaking as it serves as a guiding principle for governance. Policymakers must balance competing interests, ensuring that regulations and laws promote the common good rather than favor specific groups. By prioritizing the public interest, governments can build trust and legitimacy among citizens, fostering a sense of shared responsibility for societal well-being. Incorporating diverse perspectives in decision-making helps assess what serves the public interest, enabling more inclusive and effective policies.