Software as a Service (SaaS) delivers applications over the internet on a subscription basis, allowing businesses to access software without the need for installation or maintenance. SaaS solutions are hosted and maintained by the service provider, ensuring that applications are always up-to-date with the latest features and security patches. This model offers convenience, as users can access applications from any device with an internet connection. SaaS applications are highly scalable, allowing businesses to add or remove users as needed, paying only for what they use. Common SaaS applications include customer relationship management (CRM), project management, and email services. Security features such as encryption, multi-factor authentication, and regular audits ensure that sensitive data is protected. SaaS also promotes collaboration, as multiple users can work on the same platform simultaneously. By adopting SaaS, organizations can reduce IT overhead, improve flexibility, and ensure that they are always using the most current, secure software available.