The "U.S. Department of the Treasury. Fiscal Service, Federal Debt: Total Public Debt [GFDEBTN]" refers to a dataset provided by the U.S. Department of the Treasury's Fiscal Service, which tracks the total outstanding public debt in the United States. Public debt consists of the total amount of money that the federal government owes to its creditors, including both domestic and foreign entities. This figure is an important indicator of the country's fiscal health and is often used by economists, policymakers, and investors to analyze the government's financial stability and borrowing capacity.