A Virtual Private Server (VPS) uses virtualization software to partition physical servers into multiple "virtual" servers—each having the ability to run its own operating system and applications. VPS is not for everyone, but is quickly becoming the hosting preference of choice for advanced Web developers who require root access to the server to run their own software.
A VPS runs its own copy of an operating system (OS), and customers may have superuser-level access to that operating system instance, so they can install almost any software that runs on that OS. For many purposes they are functionally equivalent to a dedicated physical server, and being software-defined, are able to be much more easily created and configured. They are priced much lower than an equivalent physical server. However, as they share the underlying physical hardware with other VPSes, performance may be lower, depending on the workload of any other executing virtual machines.