Public health is a broad field that focuses on promoting and protecting the health of entire populations. This includes assessing and monitoring the health needs of communities, implementing programs and initiatives to improve health outcomes, and conducting research to inform public health policies and practices. Public health professionals work to prevent chronic diseases, address infectious diseases, promote healthy lifestyles, and address environmental factors that impact health. Overall, the goal of public health is to improve the overall health and well-being of communities and populations.