Big data is a collection of large data sets produced by various devices and applications with the use of different tools, techniques and framework. It is one of the emerging technology that deals with consumers, product companies and retail marketing. Big data also caused for the revolutionary changes in medical field, by storing the data of previous medical history and providing better and quick services. The decision making strategy is resulting in better operational efficiency, cost reductions and risk reducing factors for businesses. Big data systems are designed with new cloud computing architecture that allows computations to run efficiently.