SaaS stands for Software as a Service and refers to a software distribution model where applications are hosted in the cloud and made available to users via the Internet.
Instead of buying and installing software, users access it via a browser, often paying a subscription.
Today, technology companies are using this model.
In the old days, Microsoft used to sell software licenses. Once the license was sold, there was no way to make money from that customer.
That's why there's Excel 97, 2000, 2004, 2007. Microsoft updated the software and sold a new license.
At a certain point, Microsoft stopped selling licenses for its excel software and started selling subscriptions. SaaS.
As a result, it stopped making sense to launch new Exceis from time to time in order to sell more, and they began to update excel without need to create a new one, because every month they receive money from subscriptions
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