Macroeconomics is a branch of economics that focuses on the behavior and performance of an economy as a whole. It deals with issues such as the overall level of economic output (GDP), inflation, unemployment, and the interactions between different sectors of the economy. Macroeconomics seeks to understand and analyze broader economic trends and phenomena, such as economic growth, stability, and fluctuations, in order to provide insight into policy recommendations and decision-making at the national and international levels. It is a vital field of study for understanding how economies function and develop over time.