SaaS, or Software as a Service, is a cloud-based software delivery model that allows users to access applications over the internet. Instead of installing software on individual computers, users can use web browsers to interact with the software hosted on remote servers. This model often operates on a subscription basis, making it cost-effective for businesses. With SaaS, updates and maintenance are managed by the service provider, ensuring users always have access to the latest features without the need for manual installations. Popular examples of SaaS include Google Workspace, Salesforce, and Dropbox, which provide various tools for collaboration, customer relationship management, and file storage.