Software as a Service refers to a software licensing model through software gets licensed through subscriptions; it is also called “on-demand” software. Software as a Service is accessed by users which use a thin client through an Internet browser. It delivers applications across the Internet as services. So, instead of setting up or maintaining software, you access the software like a service over the Internet and spare yourself the complexities of hardware and software management. This software is web-based software and also called hosted software, running on the providers’ servers.
The SaaS provider is responsible for managing access to services, security, performance and availability. It is advantageous because the client enterprises do not have to buy any hardware or software; neither do they need to entail costs for installing, maintaining and updating these. With an Internet connection, you are free to access all applications. The usage is also scalable and you can pay for a service for as long as you need it; subscriptions are usually stoppable any time.