SaaS is a cloud-based software delivery model where applications are accessible over the Internet and managed by a third-party provider. Users access the software through web browsers, minimizing the need for hardware and IT resources. SaaS reduces costs for hardware, maintenance, and IT personnel, as the provider handles the infrastructure and support. Regular updates and security patches are performed by the provider, keeping the software up-to-date and secure.

Typical SaaS applications include CRM systems like Salesforce, collaboration and productivity tools like Microsoft Office 365 and Google Workspace, and accounting software like QuickBooks Online. SaaS offers flexible subscription pricing and scalability, allowing businesses to adjust their usage as needed. These features make SaaS a popular choice for companies of all sizes seeking a cost-effective and flexible solution for their software needs.