metrics
North star metric
What is a north star metric?
A north star metric is the single measure a team rallies around because it best captures the core value the product delivers to users. It's not revenue and it's not a vanity count - it's the number that goes up when users genuinely get what they came for, chosen so that everyone's work points the same way and short-term wins don't come at the expense of real value.
Also known as: north star metric, north star, one metric that matters
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The demo
You run a music app. Of these five numbers, which should the whole team rally around as the “north star”? Pick the one you'd steer by - then see how each really measures up.
What this demo shows (text version)
For a music app, you choose a north star metric from five candidates: total downloads, registered users, monthly ad revenue, weekly active listeners, and total minutes spent genuinely listening per week. The reveal classifies each. Downloads and registrations are vanity - they count a hope, not value received, since most may never really use the app. Ad revenue is a business outcome that lags and can be pumped in user-hostile ways. The two engagement measures actually track delivered value, with "weekly active listeners" / "minutes listened" being the kind of leading value-metric a north star should be.
The point is that a north star measures value users receive and leads the business, rather than counting activity (vanity) or reporting outcomes (revenue). One shared number aligns the team - but because a single metric flattens a complex experience and invites gaming (Goodhart's law), guard it with counter-metrics and treat it as the headline of a small, balanced set.
A good north star measures value received by users, not vanity (downloads, sign-ups) or pure business output (revenue). It should be a leading indicator that, if it rises honestly, the business follows - "weekly active listeners", "nights booked", "messages sent between friends". One number can't capture everything, so guard it with counter-metrics, and beware: the moment a metric becomes the target, people start gaming it.
Downloads and sign-ups looked impressive - but a download isn't value, it's a hope. The metric that actually tracks whether people get what they came for (the time they spend genuinely listening) is the one worth steering by. Pick the vanity number and you'll optimise for installs nobody uses; pick the value number and the business tends to follow.
A north star captures delivered value and leads the business rather than lagging it. Revenue is an outcome - it tells you the past and can be pumped short-term in user-hostile ways; vanity metrics (downloads, registrations, page views) count activity that may signal nothing. The north star sits in between: a measure of users actually receiving value (nights booked, minutes listened, weekly active teams) that, when it rises honestly, pulls revenue up with it.
Its real job is alignment. One shared number stops teams optimising in conflicting directions and gives every decision a common question: does this move the star? That focus is the point - but it's also the danger, because a single metric flattens a complex experience, and Goodhart's law warns that once a measure becomes the target it stops being a good measure (engagement chased too hard becomes addiction).
So choose it carefully and fence it in. Pick the leading value-metric for your product, then pair it with counter-metrics that catch the harm gaming it would cause (chase "time spent" and watch complaints or churn; chase "messages sent" and watch spam). Revisit it as the product matures, and treat it as the headline of a small balanced set, never the only number anyone looks at.