Software-as-a-Service (SaaS) is a cloud computing model where software applications are hosted and maintained by a service provider and made available to users over the internet. Instead of installing and maintaining software on local machines, users access the software through a web browser, often on a subscription basis. This model reduces the need for on-premise hardware and simplifies maintenance, as updates, patches, and security are managed by the provider.

SaaS is commonly used for various business applications, such as Customer Relationship Management (CRM), Enterprise Resource Planning (ERP), and productivity tools like Google Workspace or Microsoft 365. Users benefit from ease of access, scalability, and lower upfront costs since they pay based on usage or a fixed subscription.

One of the key advantages of SaaS is the ability to access applications from anywhere with an internet connection, making it ideal for remote work and collaboration. Providers also handle data backups, disaster recovery, and security updates, freeing users from the burden of managing IT infrastructure. SaaS allows companies to scale quickly, adding or removing users as needed without the need for large capital investments in IT resources.