A virtual machine is a software computer/computer file, typically called an image that functions the same way as an actual computer. In layman’s term, creating a computer within a computer. Virtual Machines like a normal computer can run different operating systems and applications.
Where and when do you usually use a Virtual Machine?
Before Virtual Machines are implemented, you would need another physical computer or server to run various services such as Web Server, Exchange Server, Database Server, File Server, etc. Although you can use one Server to host different services, it is not ideal. if the server goes down, you risk losing all your files and services. in short, you will have downtime. Having multiple physical servers also means that you will need to shell out a lot of money in order to buy the hardware, need more people to operate and maintain it and higher consumption of electricity.
Today, the use of virtual machine is essential to the company. All you need to do is buy a hardware that can support virtualization, install your choice of hypervisor and create virtualmachines already.