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SAAS service is a software delivery model based on cloud computing model, also known as "software as a service". In the SAAS model, software vendors deploy software applications on cloud servers and provide services to users over the Internet. Users can use these software applications through subscription or pay-as-you-go without having to purchase, install and maintain software. . However, users need to pay attention to issues such as data security, service reliability and supplier selection when selecting and using SAAS services to ensure that they can get the best experience.