Door hangers come handy in so many different situations. From a business perspective, door hangers prove tremendously useful since prospective customers.
Door hangers often find usage internally within businesses. To give you a rather common instance of their usage, think about hotels which have “Do Not Disturb” signage available to all hotel guests in the form of door hangers that they can conveniently hang on their doors. That way, housekeeping or any other staff / others will remain at bay when guests would not like to be disturbed.