Macroeconomics deals with the behavior and performance of the economy as a whole. It examines aggregate indicators such as national income, employment, inflation, and economic growth, and analyzes how they are influenced by monetary and fiscal policy. It also addresses the role of the state in stabilizing the economy, promoting long-term growth, and responding to economic crises. Macroeconomics provides the theoretical foundation for understanding national and international economic developments and for shaping economic policy.