What are the 5 most important banking services?

The 5 most important banking services are checking and savings accounts, loan and mortgage services, wealth management, providing Credit and Debit Cards, Overdraft services. You can read about the Types of Banks in India – Category and Functions of Banks in India in the given link.

Further readings:

1. Types of Non Banking Financial Institutions India
2. RBI – Reserve Bank of India [UPSC Indian Economy Notes]