The term "software as a service" (SaaS) refers to a cloud computing model in which software applications are hosted and delivered over the internet. Users can access SaaS applications via web browsers without needing installation or maintenance on local devices. This model offers flexibility, scalability, and cost-effectiveness, allowing businesses to adopt software solutions without significant upfront investments. Popular SaaS examples include Salesforce, Google Workspace, and Microsoft 365, which enable collaboration and productivity across teams and organizations without the barriers of traditional software deployment.