Images can exist on multiple servers, and the application will fetch it from the one that's the closest.
Distributing media among multiple servers allows for users in multiple locations to load the image quickly, without having to communicate with a server across the world.
It is possible to distribute all of your media across all servers all the time. Bear in mind that this will fill up the server storages, so considering carefully where users will want to access this resource from is appreciated.
Locations-button.