Software as a Service (SaaS) is a model of software delivery where applications are hosted by a third-party provider and accessed over the internet. It enables users to utilize software applications without the need for installation or maintenance on their local devices. Instead, users access the software through a web browser or application interface, typically on a subscription basis. SaaS offers benefits such as scalability, accessibility from any internet-connected device, and automatic updates, relieving users from the burden of software management. It is akin to renting software functionality, providing flexibility and cost-effectiveness for individuals and organizations alike.