How to Pick a North Star Metric

Simple definition

A North Star Metric (NSM) is the one metric that best reflects the core value your product creates for customers. It's not revenue, signups, or page views -- it's the action or outcome that, when it goes up, means your product is genuinely working for more people.

For Slack, it was messages sent. For Airbnb, nights booked. For a solo builder running an invoicing tool, it might be "invoices sent per week." The NSM should correlate with both user satisfaction and long-term revenue. If your North Star grows but revenue doesn't follow, you picked the wrong metric.

How to choose it

There's no universal formula. Instead, ask three questions:

1. What action means a user got real value? Not "logged in" but "completed the thing they came to do."
2. Does this metric correlate with retention? If users who do this action 3x in week one retain at 2x the rate of others, you're on the right track.
3. Can you influence it with product changes? Revenue depends on pricing, sales, and market conditions. A good NSM depends on the product experience you control.

Example

You build a meal planning app. Candidates for your NSM: signups (too top-of-funnel), revenue (lagging indicator), meal plans created per week (closer). You pull data and find that users who create at least 2 meal plans in their first week have a 60% 90-day retention rate, vs. 18% for users who create 0-1. Your NSM is "weekly meal plans created." Every product decision now passes through one filter: does this make it easier or more compelling for users to create meal plans? New recipe import feature -- yes. Social sharing feature -- maybe later. Redesigned settings page -- doesn't move the needle. The NSM forces prioritization.

Related reading

• MRR
• Activation Rate