Definition
SaaS, or Software as a Service, is a software distribution model where a third-party provider hosts applications and makes them available to customers over the internet. Instead of installing and maintaining software on individual devices, users access it through a web browser or a dedicated client application. This model simplifies IT management by offloading infrastructure and maintenance responsibilities to the vendor, allowing organizations to focus on core business functions. For example, customer relationship management (CRM) tools like Salesforce are a popular SaaS offering. Unlike platform as a service (PaaS) where developers build applications on a vendor-provided platform, SaaS provides a complete, ready-to-use application. Understanding SaaS is crucial for cloud certifications like AWS Certified Solutions Architect and CompTIA Cloud+.