Software as a Service (SaaS) is a software delivery model where applications run on remote servers and users access them through the internet rather than installing software on local computers. Examples include Google Workspace, Microsoft 365, Salesforce, and many specialized applications. SaaS offers advantages: no installation or maintenance burden, automatic updates, accessibility from any device, and subscription pricing rather than large upfront purchases. Municipalities increasingly use SaaS for email, document collaboration, financial systems, and specialized applications. Considerations include data security, privacy compliance, internet dependency, and long-term costs compared to owned software.