Important Bank doing business very much, because the Bank is a financial intermediary and credit for everyone, and some people want to do business for a loan from the Bank for use in business investment.
Major banks to do business because banks as financial intermediaries and loans for business for everyone and some people want to borrow money from banks to be used for business ventures.
The bank is important to business as a financial centre greatly because of bank and credit for every person and business for someone wanting to borrow from banks to use in the investment business.