The heart of the North Star Framework is the North Star Metric, a single critical rate, count, or ratio that represents your product strategy. This metric is a leading indicator that defines the relationship between the customer problems that the product team is trying to solve and sustainable, long-term business results.

The North Star Metric is a leading indicator of sustainable business results and customer value. As you see it change (ideally improving!), you can expect your business results to change accordingly.

A good North Star Metric represents what customers value about your product.

A North Star Metric is a Lead Measure and not a lag measure. Learn here about Lag and Lead Measures

via North Star Playbook - Amplitude