Return On Investment (ROI) is a financial metric that is widely used to measure the probability of gaining a return from an investment. It is a ratio that compares the gain or loss from an investment relative to its cost. Coursera's ROI catalogue teaches you how to calculate, interpret, and utilize ROI to make informed business and investment decisions. You'll learn about the various factors that can impact ROI, techniques for improving ROI, and how to use ROI in conjunction with other financial metrics. Furthermore, you'll gain an understanding of how to communicate ROI effectively to stakeholders and use it for strategic decision-making within a business context. This skill is particularly relevant for professionals in finance, business strategy, project management, and entrepreneurs.