In PowerPoint, all the property fields are saved as metadata. This metadata can be very useful in the cataloging and search of presentations and individual slides. In addition to editing or adding the Property content in Backstage view, you can also bring up the same Properties with the Document Panel, as an interface element within PowerPoint 2013 for Windows which directly appears above the active slide, and below the Ribbon. Additionally, you can use the Advanced Properties option.
Learn how to view and edit advanced presentation properties in PowerPoint 2013 for Windows.