The term cloud service model refers to the various frameworks through which cloud services are delivered to users. The three primary models are IaaS (Infrastructure as a Service), PaaS (Platform as a Service), and SaaS (Software as a Service). IaaS provides virtualized computing resources, enabling users to manage operating systems and applications. PaaS offers a platform for developers to create applications without worrying about the underlying infrastructure. SaaS delivers software applications over the internet, which users can access directly without installation. Each model caters to different needs, allowing organizations to choose based on their specific requirements.