The ultimate list of product metrics for PMs, June 2024 (PDF):
Acquisition: How do users find you?
Activation: How do they experience value?
Retention: Do they stay with you?
Revenue: How do you make money?
Referrals: Do they tell others about your product?
Engagement: How do they interact with your product?
This list is based on the AARRR (Acquisition, Activation, Retention, Revenue, Referral) framework. It is universal and fits every organization that works on customer-facing tech products.
I added Engagement metrics to emphasize metrics related to how users interact with the product. Depending on the context, they can be considered part of the Retention and, sometimes, Activation.