It is always, when you buy a server, you have an option of where to place it. For the server's stable operation and uninterrupted access to it, you need to have a quick connection, operating without failures. Moreover, for the hardware guaranteed operation, you need to provide certain climate conditions (temperature and humidity), and stable power supply; there should be certain monitoring systems, etc.

Such conditions are hard and costly to create for a single server. It is much easier and cheaper to place it on your provider's technical space. This guarantees fulfillment of the complete set of requirements.