What is bank's deposit management?

One of the main functions of banks is to accept deposits. Deposits may be fixed, saving, current etc Banks will have to pay interest to the customers on the basis of the amount deposited by them. Deposits are used for the purpose of lending but since banks are using other peoples money to do business, it should make shure that it will be able to repay the deposits to the respective customers when they claim for it. The management of all this is called deposit management.