Microsoft Azure Fundamentals AZ-900 Practice Question

Software as a Service (SaaS) is a cloud computing offering that provides users with access to a vendor's cloud-based software. Users do not install applications on their local devices. Instead, the applications run on cloud-based servers, and users access the software via the web or an API. The vendor manages the infrastructure, middleware, application software, and application data. An example of a SaaS application is a web-based email service through which you can send and receive emails without having to manage the email server or client software. In contrast, the other options listed either fall under different service models, such as PaaS (where the environment, but not the applications, is managed by the provider) and IaaS (which provides virtualized computing resources over the internet), or are not related to cloud service models at all.