Currency reform refers to the process of changing a country's monetary system to improve its economic stability and efficiency. This can involve introducing a new currency, adjusting exchange rates, or implementing policies to control inflation. The goal is often to restore public confidence in the currency and promote economic growth. Such reforms can be necessary after periods of hyperinflation or economic crisis, where the existing currency loses its value. Countries like Germany after World War I and Zimbabwe in the late 2000s have undergone significant currency reforms to stabilize their economies and regain trust in their financial systems.