Data administration is just a fancy technical term for the old filing room. It's information management. It helps you retain and search for information.
And that's really what it is. A way of managing information, both about your organization, your contacts, your contracts, your financial information in a manner that makes it accessible and manipulable for your organization. Information organization is the first step.
Data, or information, is the best tool in strategic planning, trend forecasting, personnel management and logistics. However, the interpretation of this is still based on the quality of staff.
Database administration, however, is a different kettle of fish, and is about keeping systems running, integrating new information into existing data structures and overall extensibility. A good database should always be firmly grounded in good, solid planning, making it responsive and adaptable to new information as needed.
Data administration ensures there is data back up and so easy retrieval even when there is data loss. it also ensures proper organization of this data for reference since organizational decisions are fact based and are supported by data. Read more on data administration on http://www.infoed.com/Open/PAPERS/business.htm.