Here are optional metrics to consider which I also teach in my Product Market Strategy course Product Market Strategy (Plan) Workshop.
•Customer Acquisition Costs (CAC)
•Customer Retention
•Attrition
•Product Velocity
•Viral Velocity
•Revenue
•Conversion Rate
•Referral Rate
•Cost of Sales
•Margin
Typically the metric or metrics that are selected tends to drive the organizational activities. For example, if “margin” is the top and only priority then such things as customer satisfaction might be damaged.
Also, if you want more depth, please consider my book: