Investment banking plays an important role in supporting businesses, investors, and financial markets. It helps organizations raise capital, manage mergers and acquisitions, and receive strategic financial advice for long-term growth. Investment banks also contribute to market efficiency by facilitating securities offerings and connecting businesses with investors. Understanding their functions and market roles can help readers gain insight into how financial institutions support economic development and corporate expansion. This guide explains the core responsibilities of investment banking, the services commonly provided, and the importance of these activities in maintaining stable and efficient financial markets around the world.