Health advocacy is an academic concept and a field of research that systematically investigates the processes, strategies, and impacts of organized efforts aimed at influencing policies, systems, and environments to promote health, prevent disease, and reduce health inequities. It examines how diverse actors, utilizing evidence and mobilizing support, seek to shape the determinants of health and advance public health goals through political, social, and economic mechanisms. Its significance lies in its role in translating health knowledge into actionable policy and practice, thereby contributing to improved population health outcomes and the realization of health as a human right.