According to Wiki, Business intelligence (BI) is a set of theories, methodologies, architectures, and technologies that transform raw data into meaningful and useful information for business purposes. Most of the organizations are busy hunting new prospective customers/clients so to meet their business targets but the procedure in which it is done renders the productivity low.
For big organizations, with multiple business units, the amount of data that they do possess is huge and more time should be invested in studying the same to understand more about the customers and their requirements. By studying and deriving powerful theories, your organization can win the race against their competitors to get the order with little effort.
A business intelligence tool would study and analyze all the information at disposal and convert them into meaningful data allowing the decision makers of the organization to have a clear insight into the future and make well informed choices.