Virtualization allows a single physical machine to function as multiple virtual computers through software abstraction, enabling the operation of independent operating systems on shared hardware. This approach maximizes hardware utilization, reduces costs, and enhances DevOps efficiency by minimizing the need for physical servers. Virtual machines (VMs), which are managed by hypervisors, act as independent computers, each with its own resources, and are crucial for maintaining system resiliency and high availability. Virtualization simplifies maintenance and scalability, enabling rapid deployment and management of VMs while offering environmental benefits by reducing power consumption. It also facilitates DevOps processes by allowing the creation of isolated environments for testing and development without the need for additional hardware, ultimately supporting a more efficient, cost-effective, and eco-friendly IT infrastructure.