What investment banking does?

Investment Banks act as a financial advisor to the companies. They help their clients in arranging funds, equity financing, underwriting deals, arranging private placements and negotiation M&A.

What is the difference between banking and investment banking?

Bank is the financial institution that accepts deposit and lends loan but Investment bank acts as a financial consultant or analyst for start-up or corporations by underwriting equity and debt securities, helping create capital, and issuing stocks.