VPS stands for Virtual Private Server. This refers to the partitioning of a physical server into multiple servers. In effect, each one acts just like a dedicated server, you get all the features of a dedicated server but at a lower price. Each VPS has its own operating system, and each can be rebooted separately. These operating systems each receive a specific share of the resources of the physical server, no more and no less, they are isolated from each other so that one cannot interfere with another. If one VPS experiences problems or tries to use too much memory or CPU resources, it has no effect on the others.
