Social determinants of health are the conditions where people are born, live, work, and age that impact health outcomes. These conditions include social, economic, and physical factors in environments like schools, workplaces, churches, and neighborhoods. Health is defined by the WHO as a state of complete physical, mental, and social well-being, not just the absence of disease. There are correlations between better health outcomes like lifespan and higher income, literacy rates, and lower unemployment.