This essay delves into the crucial role of nurses in primary health care (PHC), specifically focusing on health promotion strategies within the context of the Ottawa Charter. It begins by defining PHC and outlining the diverse roles of nurses, including health promotion, treatment, and patient education, with a particular emphasis on the care of older adults. The essay distinguishes between primary care and PHC, highlighting the broader scope of the latter, which is aligned with the World Health Organization's principles. The core of the essay explores the application of the Ottawa Charter's strategies, such as building healthy public policy, creating supportive environments, strengthening community action, developing personal skills, and reorienting healthcare services, to prevent chronic diseases among the elderly population. The discussion emphasizes the nurses' role in implementing these strategies through assessments, patient education, and advocacy. The essay concludes by reiterating the importance of nurses in promoting health outcomes and preventing illness through the effective application of PHC principles and strategies.