If you want to expose the areas of your feedback items to the users of the portal you can enable this setting. When you enabling this option: If you've chosen to display areas on the portal you can also pick which areas are visible on the portal (because sometimes you might not want to expose all your areas on the portal). In the area filter only selected areas will be shown. For feedback items if the item's area is one of those chosen not to be visible on the portal noting will be displayed under the Category label.Showing Feedback's Area on the Portal
To do so: