Let’s say you have an RSS feed of some PDF documents on Issuu and you want the feed to be sans-description. Issuu doesn’t let you upload/save a PDF without a description, and if you edit the document after upload it won’t let you save it that way either unless you have a description. But….if you edit the details of more than one pdf at the same time you can update the description field and remove the description from both and Save that way. (if you need to you can add back the description to the other document)
