I am sure that you are thinking that having a single major metric for your SaaS sounds ludicrous. And it does; at first. But, let me explain.
As a founder or VP, you need to have one or two key metrics that just by looking at them, you can gauge your performance in any given time/month. However, different SaaS business models need a different major KPI.
Below, I will describe the most popular SaaS business models and the most important key metric they need to monitor frequently, as well as the reasons for choosing each of those metrics.
Let me explain first why having such a metric and monitoring it daily is so crucial.