Admins can create a tag that can be used as a condition if content is going to be played or not. For example, you can create a tag and use that tag on a playlist item. This will set a condition that the playlist item should only be played if the tag is present on a specific display. The tag can then be added to a display to make the condition you set on the playlist item in the playlist to either be true or false, the item will then either show or not show depending on the condition set.