Imagine you wish to invest in a company’s shares today. But before you actually invest your hard earned money into an unknown venture, you decide to evaluate your future returns. These returns can be classified as good or bad depending on both the company’s future performance and the amount you have invested today. If the returns you receive are higher than what you have invested or are planning to invest, then the Return on Investment or ROI is high. However, if the returns you receive are lower than what you invested or intended to invest, the ROI is low.