The acronym IaaS, meaning Infrastructure as a Service, refers to cloud computing services that provide virtualized computing resources over the internet. This model allows businesses to rent IT infrastructure such as servers, storage, and networking on a pay-as-you-go basis, reducing the need for physical hardware investments. IaaS solutions offer flexibility, scalability, and ease of management, enabling organizations to adjust resources according to demand. This is particularly beneficial for startups and enterprises seeking to optimize their IT budgets and minimize operational complexities.