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Software as a service (SaaS) refers to software applications delivered over the internet on a subscription basis, eliminating the need for businesses to install, manage, or maintain software on their own infrastructure. It typically appears as cloud-hosted applications accessible via web browsers or APIs, built on scalable cloud platforms, and integrated with services like identity management, data analytics, and automated updates.

Relevance to business: SaaS offers rapid deployment, lower upfront costs, seamless scalability, and continuous innovation, enabling teams to focus on core activities while benefiting from secure, always-up-to-date software solutions.