SaaS, short for Software-as-a-Service, is a software delivery model where vendors deploy applications on their servers and customers subscribe to the desired software services over the internet based on their specific needs. Customers pay the vendor based on the quantity and duration of the subscribed services and access the services provided by the vendor through the internet. With the development of internet technology and the maturity of application software, this model emerged as a completely innovative software application approach in the 21st century.
