Macroeconomics is the branch of economics that focuses on the overall behavior and performance of the economy as a whole. It examines aggregates, such as national income, employment, inflation, and economic growth, and analyzes the factors that influence these macroeconomic variables. Macroeconomics studies the interactions between different sectors of the economy, including households, businesses, governments, and the foreign sector. It analyzes fiscal and monetary policies, international trade and finance, business cycles, and the determinants of long-term economic growth. Understanding macroeconomics helps in assessing the overall health and stability of an economy and formulating effective macroeconomic policies.