Public health nursing is the field of using information from the nursing, social, and public health sciences to promote and protect the health of populations. A registered nurse (RN) who advocates for radical changes in community health is known as a public health nurse. Nurses in this interesting career can engage directly in communities to educate people and provide them with the skills they need to improve their health outcomes. By teaching communities and providing treatment within them, public health nurses play a crucial role in improving population health outcomes. A public health nurse's job is to promote public health.