Accounting is tremendously important because it is the language of business, and it is at the root of making informed business decisions. Without accounting, managers would not know which products were successful, which business decisions were the right ones, and whether the company was earning money. It would not know how much to pay in taxes, whether to lease or buy an asset, or whether to merge with another company. In short, accounting doesn't just count the beans, it measures a company's success at meeting its goals and it helps investors understand how efficiently their economic resources are being used. This is why companies must be proficient in accounting in order to make good decisions.
Accounting can be controversial, in that accounting rules and methods are sometimes subject to interpretation or can appear to distort a company's true performance. This is another important reason that effective leaders and managers must thoroughly understand the accounting impact of their decisions.