IaaS (Infrastructure as a Service) is a cloud service suitable for organizations that need to use IT infrastructure without the need to invest in hardware, such as computing resources, networking systems or storage space. The service provider manages the installation, maintenance, and administration of this infrastructure.

IaaS helps organizations to flexibly scale up or down their systems based on business needs or directions, while ensuring the efficient operation of various applications. It also allows for effective cost control.

Popular IaaS providers include AWS, Microsoft Azure, and Google Cloud, which manage the underlying infrastructure, while users can manage software, operating systems, and applications according to their needs.