A VPS Server is the reasonable web hosting choice for your domains when more system resources are needed. VPS takes of the virtualization technologies to partition physical servers into several virtual machines. Virtual Private Server Hosting is the future of modern hosting as it provides the power and functionality of a high-end dedicated server but at a much lower price. Main virtualization technologies used including Vmware, OpenVZ and XEN etc. By purchasing a VPS hosting package, you get a 100% individual machine with your own dedicated CPU and RAM, and mostly root access to the hosting server. Each Virtual Server can run under its own operating system (Windows server, CentOS and other Linux distributions) or have custom configurations of its own.
All the features I've detailed to this point are valuable to the web hosting experience, but none matches the critical importance of site uptime. If your site is down, clients or customers will be unable to find you or access your products or services. It doesn't matter how great the features are, or how good it looks; if your site is down, it might as well not exist.
Managed VPS hosting is the ideal solution for both non-technical but also technically savvy people since the hosting provider takes care of any technical tasks related to the server. In other words the web hosting provider is responsible for managing the server including system upgrades and configuration and your job is to do what you are supposed to do i.e. run your website or online business.
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.