Virtualization is one of the fundamental technologies that enables cloud computing by allowing multiple virtual machines (VMs) to run on a single physical server. It abstracts hardware resources such as CPU, memory, storage, and networking into logical units that can be allocated dynamically according to user requirements. This abstraction increases resource utilization, reduces hardware costs, simplifies management, and provides the flexibility needed for modern cloud environments. Cloud service providers rely heavily on virtualization to deliver Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and even support Software as a Service (SaaS) efficiently. The importance of virtualization in cloud computing lies in its ability to maximize hardware utilization while minimizing operational expenses. Instead of dedicating one physical server to one application, virtualization enables several virtual machines to share the same physical infrastructure without interfering with each other. This consolidation reduces power consumption, cooling requirements, and maintenance costs. Organizations can rapidly deploy new virtual machines whenever required, making cloud environments highly scalable and responsive to changing workloads. Virtualization also supports elasticity, which is a defining characteristic of cloud computing. Resources such as CPU, RAM, and storage can be allocated or deallocated dynamically based on application demand. This ensures efficient utilization of computing resources and allows businesses to pay only for what they use. Virtualization also simplifies disaster recovery because virtual machine snapshots and backups can be created easily and restored quickly in case of failures. Security in cloud computing is significantly enhanced through virtualization. The hypervisor, also known as the Virtual Machine Monitor (VMM), acts as a secure layer