North Star Metric
In one line
A north star metric (NSM) is the single number that best captures the core value your product delivers to customers, used to align decisions across the whole company.
Going deeper
A north star metric is the single number meant to align the whole company on the same direction. The classics are Airbnb's nights booked, Spotify's listening time and Facebook's monthly active users.
A good NSM usually clears three tests. It maps directly to user value, it correlates positively with revenue, and the team can actually move it. Pure revenue and raw signups tend to fail at least one of those, which is why neither makes a great NSM.
Locking onto a single metric is also risky in isolation. Pure NSM optimisation often degrades something else quietly, so most mature teams pair it with two or three guardrail metrics that catch the side effects.
Related terms
AARRR
AARRR — Acquisition, Activation, Retention, Referral, Revenue — is the five-stage growth metrics framework popularised by Dave McClure and used as the default scaffolding for growth teams.
MarketingMAU / DAU
MAU and DAU (Monthly and Daily Active Users) count the unique users who actually engaged with your product in a given window — the standard size and stickiness metric for digital products.
MarketingRetention
Retention is the share of users who continue to use or purchase from your product over time after their first touch — a primary signal of long-term product health.
MarketingLTV
Lifetime value (LTV) is the estimated total revenue — or profit — a single customer is expected to generate over the entire relationship with your business.
MarketingPMF
Product-market fit (PMF) is the state where a product clearly satisfies a real market demand — usage compounds, churn drops and word of mouth starts doing real work.
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