Macroeconomic theories are frameworks that help explain how economies function on a large scale. They focus on aggregate indicators such as GDP, unemployment rates, and inflation to understand economic performance and guide policy decisions. These theories aim to analyze the relationships between different sectors of the economy and how they interact with each other. Key macroeconomic theories include Keynesian economics, which emphasizes the role of government intervention in stabilizing the economy, and classical economics, which advocates for free markets and minimal government involvement. Other important theories include monetarism, which focuses on the control of money supply, and supply-side economics, which highlights the importance of production and supply in driving economic growth.