There are many tools for virtualization itself. Linux virtualization offers operational cost advantages.
Virtualization is a concept that many users do not understand. This is the efficient use of hardware resources and their efficient configuration during operation. Imagine a situation where you need to publish several Internet projects on one server. In order for your Apache to know that it will be a so-called multihosting, you need to set up several virtual guests. It is the same if you want to run several operating systems on one computer. You need to virtualize your computer so that it can divide its computing capacity into several segments. As already mentioned, you can simply increase or decrease these parameters for specific virtual machines.