A technology that lets you run multiple operating systems or virtual environments on the same physical hardware via a hypervisor. It is the underlying technology of the cloud.
Mentioned in AZ-900 and CLF-C02 as the technical foundation of the cloud. It enables multitenancy and efficient hardware utilization. Fundamentals exams rarely dig into hypervisor internals.
Virtualization is a concept that can show up on the exam. Check the full guide to see it in context.