SaaS (Software as a Service) is a cloud-based software delivery model where applications are hosted online and accessed via a web browser. Unlike traditional software that requires installation on local computers, SaaS applications are accessed remotely, allowing users to benefit from features such as automatic updates, scalability, and access from any internet-connected device. Businesses and individuals typically subscribe to SaaS solutions on a monthly or annual basis, reducing upfront costs and improving flexibility. Popular examples include CRM systems, project management tools, and email marketing platforms. SaaS is widely adopted due to its ease of use, cost-effectiveness, and ability to scale with business needs.