Software-as-a-Service (SaaS) is a cloud computing model where software applications are hosted and provided to users over the internet on a subscription basis. In the SaaS model, software vendors manage all aspects of the application, including maintenance, updates, security, and infrastructure, while users access the software through a web browser or application interface.

SaaS has become increasingly popular across various industries and business functions, including customer relationship management (CRM), enterprise resource planning (ERP), human resources management (HRM), collaboration and productivity tools, and more. SaaS offers several benefits, including reduced upfront costs, faster deployment, automatic updates, scalability, and accessibility, making it a cost-effective and flexible option for organizations looking to leverage technology to drive innovation and growth.