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Three computer scientists from UC Irvine address the question

A wealth of digital information is being generated daily, information has great potential value for many purposes if captured and aggregated effectively. In the past, data warehouses were largely an enterprise phenomenon, with large companies being unique in recording their day-to-day operations in databases, and warehousing and analyzing historical data to improve their businesses. Today, organizations and researchers in a wide variety of areas are seeing tremendous potential value and insight to be gained by warehousing the emerging wealth of digital information, popularly referred to as “big data,” and making it available for analysis, querying, and other purposes [1].