A page represents an image captured by a scanner, normally saved as a TIFF file, or a file imported from your file system.
You can import pages in any file format, and pages in different formats can reside in a single item. For example, your imported item might contain several pages in Microsoft Word format and additional pages in PDF or Microsoft Excel format.
If you delete all of the pages from an item, you can still perform certain actions on it, such as adding new pages, changing its properties, and returning the item in search results.