Picking the right north star metric

It's tempting to track the numbers that go up and to the right: total signups, companies created, page views. These feel good in board meetings but they don't tell you whether your product is actually working. The number of customers you acquire means very little if most of them never come back.

What matters is what happens after signup — are customers activating, engaging, and sticking around? A company that signs up 300 new accounts in a quarter but only converts 60% of them into active users has a very different story from a company where 95% of signups are trading regularly within a month.

One of the most underrated metrics in product management is the ratio of weekly active users to monthly active users (WAU/MAU). It measures stickiness — how habitually your customers use your product. A WAU/MAU ratio of 50% means half your monthly users are engaged every single week. That's not vanity. That's genuine engagement.

And here's the insight: if that ratio holds steady as your total user base grows, you're not diluting the pot with the wrong customers. You're attracting the right ones. Casual users and one-hit wonders aren't becoming the norm — consistent, engaged customers are.

Your north star metric should capture the core value your product delivers to customers. For a ticketing platform, it might be total tickets sold. For a CRM, it might be deals closed by users. For a collaboration tool, it might be active projects. The key is that it measures the thing customers actually care about — not a proxy for your internal operations.

When you pick the right north star, everything else should follow the same trend: revenue, engagement, retention, expansion. If those metrics diverge from your north star, either you've picked the wrong one or something structural needs attention.

A good north star metric doesn't just guide product decisions — it aligns every team. Engineering should understand that the features they build need to move the north star. Customer success should know that deeper engagement directly drives it. Sales should focus on acquiring the kind of customers who will contribute to it, not just any customer who'll sign.

When your revenue model is tied to customer activity — percentage-based fees, usage pricing, transaction volumes — this alignment becomes even more powerful. Everyone earns when the north star moves. Growth becomes a shared responsibility, not a sales target.

The north star gives you direction, but you also need to understand what sits underneath it. If your north star is items sold, you need to see the breakdown: core transactions, ancillary products, fees, point-of-sale volumes. Each layer tells a different story about where growth is coming from and where the opportunities are.

You might discover that ancillary revenue streams are growing faster than your core product, suggesting new product investment areas. Or that one category is flat while everything else grows, signalling a problem to investigate.

The north star is the headline. The layers beneath it are the narrative.

A north star metric isn't permanent. As your product matures and your market evolves, the thing that best captures value delivered might change. Early-stage products might track activation. Growth-stage products might track engagement or transaction volume. Mature products might track expansion revenue or net retention.

The signal that it's time to revisit is when your north star is consistently moving in the right direction but your business outcomes aren't keeping pace — or when the metric has become so ingrained that teams are optimising for it at the expense of things that actually matter.