A virtual machine (VM) is a software-based computer that runs on physical hardware but operates independently — with its own CPU allocation, memory, storage, and network interface. A layer of software called a hypervisor manages this separation, allowing multiple VMs to run securely on the same physical server without interfering with each other.
In practice, this means you get a dedicated-feeling environment — root access, full OS control, your own resources — without owning or managing physical hardware. When your needs grow, resources can be added without migrating to new hardware.
