Cloud service models define how cloud services are delivered to users. The three main cloud service models are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
IaaS provides virtual servers, storage, and networking. PaaS provides a platform to build, test, and deploy applications without managing the infrastructure. SaaS delivers ready-to-use software through a web browser without requiring installation.
In simple words, cloud service models let you choose the level of control you need. IaaS gives the most control, PaaS helps developers build applications faster, and SaaS is the easiest option for everyday users.