Product outcomes differ from business outcomes because they can be controlled by the product team

A product outcome is in full-control of the product team, so it can be measured and it can be influenced by the team's behaviour.

A business outcome like revenue is usually a lagging indicator because it's quite difficult to find a cause-effect relation between what changed in the product and what increased the former.

Product problems belong to the complex domain (based on Cynefin), and The correct response to complexity is probe, sense, respond