text book marketing managment

Briefly explain why so many companies today are using Big Data as an important part of their Marketing Information System (MIS). In your answer, provide 3 specific examples of Big Data (dont just say online information be specific about the kind of data and the source). For each example, describe what an organization could learn from the Big Data. Finally, there are four parts of an MIS. Explain what part of the MIS Big Data belongs to.