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The One Metric That Matters (OMTM) is the idea that at any given stage of your product’s growth, there is one metric more important than all the others - and that ruthlessly focusing on moving that metric is more effective than trying to improve everything simultaneously 🎯 It comes from Lean Analytics by Alistair Croll and Benjamin Yoskovitz, who argue that the discipline of choosing one metric forces clarity about what stage you’re at and what actually matters right now.

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Why one metric

Dashboards with twenty metrics feel thorough. They’re usually a way of avoiding a hard decision about what matters most. When everything is a priority, nothing is. A single metric forces the team to agree on what success looks like for this period. It becomes a filter for prioritisation - does this initiative move the OMTM? If not, why are we doing it? It makes trade-offs explicit rather than leaving them implicit and unresolved 💡

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The OMTM changes over time

The right metric depends on your stage. An early-stage product that hasn’t found product-market fit should probably be focused on activation or retention - are users getting enough value to come back? A product with strong retention but slow growth should probably focus on acquisition. A product with good acquisition and retention but poor monetisation should focus on revenue conversion. Tracking the wrong metric for your stage is a common trap. Optimising acquisition before you’ve fixed retention fills a leaky bucket. Optimising revenue before you’ve validated value creates short-term numbers that mask long-term problems.

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OMTM vs. North Star

These are related but different. The North Star metric is a longer-term, stable metric that captures the core value your product delivers. The OMTM is the most important thing to move right now - it might be the North Star, or it might be an input metric that’s blocking you from reaching the North Star. Think of the North Star as the destination and the OMTM as the next waypoint 🙌

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The discipline in practice

Pick the metric, share it publicly within the team, and review it weekly. Everything the team prioritises should connect back to it. When the metric moves - or doesn’t - that’s the conversation to have. Lesson learned: the most useful thing about the OMTM isn’t the metric itself - it’s the conversation that happens when you try to agree on one. Disagreement about which metric matters most usually reveals disagreement about strategy.