Choosing the metric that matters

Once the product is live, numbers multiply: visits, downloads, sign-ups, messages, followers. You can track all of them, but giving them all the same attention distracts the team. An early-stage startup needs one key metric: the number that best shows whether the company is heading in the right direction.

The key metric should reflect real value delivered to customers. If your product is paid, the best choice is often revenue: people do not pay unless they get value. If you are not charging yet, the number of active users or the number of core actions completed works. For example:

A good key metric is easy to understand, precise to measure and directly tied to what the team does.

At an early stage it pays to measure growth by the week, not the month. A week is short, so you notice mistakes sooner and see the effect of changes sooner. The calculation is simple: divide this week's number by last week's and subtract one. If you had 40 active shops last week and 42 this week, you grew 5 percent.

Small percentages look modest, but compounding is powerful. Simple arithmetic: growing 1 percent a week multiplies a number by roughly 1.7 over a year. Growing 5 percent a week multiplies it by roughly 12.6 over a year. That is why a small difference in the weekly rate becomes a huge difference by the end of the year.

Some metrics feel good but say almost nothing about the business:

You do not have to ignore these numbers, but do not make decisions based on them. Ask yourself: if this number doubled, would our business really be better?

Set a weekly growth target and review the result every week in a short team meeting. If you missed it, find out why. A target points you to the most important work: if you need growth this week, it becomes obvious that talking to new customers matters more than polishing a small feature.

Keep the target realistic. One that is too high demoralises the team; one that is too low changes nothing. Adjust it after a few weeks of results.

You do not need a complex analytics system. A simple spreadsheet will do: one row per week, with the key metric, the growth percentage and a short note on what was done that week. Update it on the same day every week. After a few months it becomes one of your most valuable documents, both in conversations with investors and when you make decisions yourself.

Numbers show what is happening, but not why. If the key metric stalls, you cannot find the reason in the spreadsheet alone. Talk to customers. The number asks the question; the conversation answers it.

Yes, but rarely. As the company develops, the key metric can change: active users at first, revenue once you start charging. But do not change it every week. If you pick a different number because you do not like the current one, you are fooling yourself. When you do change it, write down why, keep tracking the old number for a while, and explain to the team what has changed.

Choose one key metric for your product and write one sentence on why it is that one. Calculate it for the past four weeks and work out the weekly growth rate. Set a weekly target for the next four weeks, and start updating the spreadsheet every Monday.