Reasons the U.S. government might issue bonds are to finance the federal deficit by selling Treasury securities through public auctions. The U.S. government also issues bonds to provide fixed-income securities.
Reasons the local government might issue bonds are to better improve things that benefit the community. For example, Build, repair, or improve streets, highways, hospitals, schools, and etc. Furthermore, bonds are issued to cover the funding of courthouses, schools, and municipal office buildings.
Reasons corporations might issue bonds are to raise capital and take advantage of low interest rates. Another reason a corporation might issue a bond is to finance investments for inventory, equipment, research, development,