Quantitative easing (QE) is a monetary policy in which a central bank, such as the Federal Reserve in the United States, buys government bonds or other financial assets from commercial banks and other financial institutions in an effort to stimulate economic growth and increase the money supply.

The goal of quantitative easing is to reduce long-term interest rates, encourage investment and spending, and boost economic activity. By purchasing large amounts of government bonds or other assets, the central bank injects money into the economy and increases the supply of credit, which can help to lower interest rates and stimulate lending and borrowing.

Quantitative easing can be used by a central bank during times of economic recession or when interest rates are already low and traditional monetary policy tools are no longer effective. However, it can also lead to inflation if the money supply grows too quickly and outpaces economic growth, which is a concern for many economists.

Overall, quantitative easing is a controversial policy tool that is often debated among economists and policymakers, with proponents arguing that it can help to boost economic growth and reduce unemployment, while opponents argue that it can lead to inflation and other economic problems in the long run.