Health literacy plays a crucial role in influencing individuals' health behaviors and outcomes. This review article explores the impact of health literacy on various aspects of health, including preventive behaviors, treatment adherence, and overall health outcomes. The relationship between health literacy and health disparities is also examined, highlighting how limited health literacy can exacerbate existing inequalities in access to healthcare and health outcomes. Additionally, the review discusses the implications of health literacy for healthcare providers and policymakers, emphasizing the importance of promoting health literacy to improve population health.