The chapter provides an overview of the evolution and significance of health promotion, as reflected in the 1986 WHO glossary and subsequent updates. It highlights the importance of health promotion in achieving the *Ottawa Charter* and the *Jakarta Declaration on Leading Health Promotion into the 21st Century*. The glossary aims to facilitate communication and understanding among various stakeholders in health promotion by defining key terms and concepts. Key concepts include health, health promotion, disease prevention, health education, and various strategies and actions for health promotion. The glossary emphasizes the importance of community involvement, empowerment, and addressing social, economic, and environmental determinants of health. It also discusses the role of health literacy, health outcomes, and healthy public policies in achieving equitable and sustainable health improvements.The chapter provides an overview of the evolution and significance of health promotion, as reflected in the 1986 WHO glossary and subsequent updates. It highlights the importance of health promotion in achieving the *Ottawa Charter* and the *Jakarta Declaration on Leading Health Promotion into the 21st Century*. The glossary aims to facilitate communication and understanding among various stakeholders in health promotion by defining key terms and concepts. Key concepts include health, health promotion, disease prevention, health education, and various strategies and actions for health promotion. The glossary emphasizes the importance of community involvement, empowerment, and addressing social, economic, and environmental determinants of health. It also discusses the role of health literacy, health outcomes, and healthy public policies in achieving equitable and sustainable health improvements.