This document provides an overview of data management for librarians. It defines data and data management, which involves helping researchers cite, store, catalogue, and provide access to their data. A data management plan is a plan for how a researcher will handle their data during and after their research. Many funding agencies now require a data management plan. The document encourages librarians to refer researchers to their institution's data services team for help with data management tasks and creating data management plans. It also emphasizes that data management is now an important part of the librarian's role to support researchers.