Software as a Service (SaaS) involves delivering applications over the internet, eliminating the need for users to install or maintain software on their local systems. This model ensures that updates, security patches, and new features are managed centrally, providing a seamless experience for users without interruptions. SaaS offers scalability, allowing businesses to adjust usage according to demand, while providing secure data storage and access from any device with an internet connection. The subscription-based nature of SaaS ensures cost-effectiveness and flexibility, making it an ideal solution for businesses seeking streamlined operations and continuous software improvements.