SaaS (Software as a Service) is a software delivery model where software applications are hosted and made available to customers over the internet. SaaS customers access the software through a web browser or an app, eliminating the need for them to install, configure and maintain the software on their own computers. Some key features of SaaS include:

1. Cloud-based delivery: SaaS is delivered over the internet, eliminating the need for customers to install and maintain software on their own computers.
2. Subscription-based pricing: SaaS is typically sold on a subscription basis, with customers paying a monthly or annual fee to access the software.
3. Automatic upgrades: SaaS providers handle software upgrades and maintenance, ensuring that customers always have access to the latest version of the software.
4. Scalability: SaaS applications are designed to be highly scalable, allowing customers to easily increase or decrease their usage as their needs change.
5. Accessibility: SaaS applications are accessible from any device with an internet connection, making it easy for users to access the software from anywhere.
6. Collaboration: SaaS often includes collaboration features, such as team workspaces and real-time collaboration tools, making it easier for teams to work together.
7. Customization: SaaS providers may offer customization options to customers, allowing them to tailor the software to their specific needs and requirements.
8. Data security: SaaS providers are responsible for the security of customer data, and often employ robust security measures, such as encryption and secure data centers, to ensure data privacy and protection.
9. Integration: SaaS applications can be integrated with other cloud-based services, such as customer relationship management (CRM) and enterprise resource planning (ERP) systems, to streamline business processes.