Even though investment banking wasn’t a part of my rotational program, I used my summer internship opportunity as a way to learn more about it. One of our projects was even to put together an Investment Banking 101 presentation. At a high level, investment bankers have two main roles: advisory and execution. Corporations want to maximize shareholder value and look to banks to help provide M&A (mergers and acquisitions) or capital structure advice or actually execute those M&A, debt, or equity transactions. There are plenty of resources out there on this that go into more detail.