This article provides a comprehensive overview of investment banking, detailing its critical role in the global financial system. It covers the key functions of investment banks—such as capital raising, mergers and acquisitions, trading, and risk management—and outlines the diverse clientele they serve, from corporations and governments to institutional investors. The article also explores the essential skills required for a career in investment banking and describes typical career progression, from Analyst to Managing Director. Whether you're a finance student, professional, or simply curious about how investment banks operate, this guide offers valuable insights into one of finance’s most dynamic fields.