This document discusses how data classification can help organizations harness big data. It provides an example of an energy company that used data classification to take back control of their data by classifying information stored in systems like SharePoint according to a new data classification policy. The company benefited from increased user awareness of sensitive data, improved information sharing practices, and boosted returns on other security technologies. Finally, the document outlines drivers for data classification, including managing large data volumes, legal and compliance needs, and protecting corporate assets and brand.