What is Software as a Service, SaaS? ...and PaaS ...and IaaS

The video tutorial explains various software purchasing models, focusing on Software as a Service (SaaS). It describes SaaS as a subscription-based model where software is hosted online, offering benefits like cost predictability and maintenance by the provider. The video also introduces Platform as a Service (PaaS) and Infrastructure as a Service (IaaS), highlighting their advantages. It discusses the types of software available as SaaS and the potential challenges, such as data security and provider stability.

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