**IAAS** stands for Infrastructure as a Service, a cloud computing model that provides virtualized computing resources over the internet. In IAAS, users can rent virtual machines, storage, and networking capabilities, allowing them to scale their IT infrastructure based on demand without the need for physical hardware. This flexibility enables businesses to optimize costs, focus on application development, and respond to changing workloads swiftly. IAAS is ideal for companies looking to enhance their operational efficiency and reduce the complexities associated with managing on-premises infrastructure.