The Happiness Index is a measure that ranks countries based on the subjective well-being of their citizens. It takes into account various factors such as income, social support, life expectancy, freedom to make life choices, generosity, and perceptions of corruption. This index aims to provide a comprehensive view of how happy people feel in different nations. The World Happiness Report publishes the Happiness Index annually, offering insights into global happiness trends. Countries like Finland and Denmark often rank high, reflecting strong social systems and quality of life. Understanding the Happiness Index can help policymakers improve the well-being of their citizens.