To know exactly what the functions of commercial banks are? Firstly we should try to understand that what commercial bank is? Commercial Banks are those institutes which deal with the money and engaged in performing the routine activities of banking business. Commercial banks are primarily established to earn profit. It deals with the funds of other. It takes money from one person and lends to another. They give fixed amount of interest while talking money from others and give to needy people and take a fixed amount of interest which is higher than previous one. So difference between both of them is actually the profit of bank. Along with this borrowing and lending money, there are a lot more functions of commercial bank, which play a vital role in the development of country and also give a lot benefits to the general public.