The significance of Franklin D. Roosevelt's New Deal policy was profound in addressing the devastating effects of the Great Depression. Implemented in the 1930s, the New Deal comprised a series of economic programs aimed at providing relief, recovery, and reform. Key initiatives included the establishment of the Social Security Act, public works projects, and financial system reforms. Roosevelt's policies aimed to stimulate economic growth and provide jobs, radically reshaping the role of government in the economy and laying the foundation for the modern welfare state.