This document discusses the benefits of open data, including transparency in government spending, improving data quality, and releasing social and commercial value by allowing others to build new applications using public data. Open data also promotes participation and engagement by empowering individuals and organizations with information. Specifically, publishing expense data can help spot issues, motivate good behavior, and save money compared to individual freedom of information requests. Releasing mapping data, for example, allows others to create useful tools like crime maps and location-based applications.