Display Names help you add an identifier so that you can differentiate different locations with the same name.
For example, "New York" is the display name for HANOVER & TYKE:
To edit this, go to your Account Settings and click EDIT next to the business/location you'd like to add a display name for.
From there, you can add a display name for this business.
Display Names are only visible to you. You can also use display names to easily identify locations from the dropdown: