The National Bank is a financial institution that provides a range of banking services to individuals, businesses, and governments. It typically offers services such as savings and checking accounts, loans, and investment options. National banks are regulated by the government to ensure stability and protect consumers. In many countries, including the United States, the National Bank plays a crucial role in the economy by managing the money supply and interest rates. It also acts as a lender of last resort during financial crises, helping to maintain public confidence in the banking system and support economic growth.