Simple definition
Hardware virtualization uses processor features to let a hypervisor run isolated virtual machines efficiently.
Purpose and use
Hardware virtualization gives a hypervisor processor mechanisms for running and controlling guest operating systems.
How does it work?
Extensions such as Intel VT-x or AMD-V help manage guest execution and transitions to the hypervisor.
Example and verification
Check processor support, firmware enablement and availability to the intended hypervisor.
Points to watch
This assistance alone neither creates a VM nor guarantees compatibility with every guest or perfect isolation.
In short
Hardware capability must be used by a compatible virtualization stack.