1,000 e-shops later: why I no longer trust gut feelings

In more than twenty years in e-commerce, over a thousand e-shops have passed through my hands — I built them, integrated them and, above all, analyzed them. And if those years taught me anything, it is this: the biggest damage in e-commerce is not done by a bad idea, but by a good feeling.

Lesson one: revenue is a drug, margin is the truth

Almost every e-shop I have ever analyzed lived on revenue. Revenue grows — we celebrate; revenue drops — panic. But revenue is a metric for the ego, not for decision-making. I have seen e-shops with record sales that lost money on every single order — it just wasn't visible in the totals. Free shipping above a small basket, 15% off the first purchase, ads eating a third of the margin — and suddenly the record-breaking December is the most expensive month in the company's history.

When you look at margin after advertising and logistics instead of revenue — at the level of individual orders, not monthly averages — the story often turns around completely. The products that "drive sales" suddenly mostly drive money out of the company.

Lesson two: gut feeling always runs late

An e-shop owner usually has excellent intuition — about what their market looked like two years ago. Intuition is built from experience, and experience ages. Carrier prices changed, customer behaviour changed, the competition changed. Your gut will catch up in a year; the data knows today.

That is why I say good decisions are made over data and hard numbers — not on a hunch. It does not mean deciding without experience; it means letting the numbers continuously calibrate it.

Lesson three: don't start with a dashboard, start with a question

The most common mistake I see when a company decides to "become data driven": they buy tools, build a dashboard with thirty charts — and six months later nobody looks at it. A dashboard without a question is just wallpaper.

The opposite approach works. Ask one specific question that hurts: Do I make money on orders with free shipping? Which customers come back, and where did they come from? What is actually left from a campaign after discounts? Find the data that answers it. And only once an answer has changed a real decision, add the next question. A year later you will discover you have a dashboard — and that you check it every morning, because it was built from your own questions.

This is exactly the principle behind e-shop.report: instead of thirty charts, it puts those guiding questions in front of you — so the owner always sees them, answers them, and gets clear, meaningfully visualized data for each one. You can read the answer in seconds.

What to take away

You do not need a data team or expensive tools. Three habits are enough: measure margin instead of revenue, let the numbers calibrate your intuition, and build analytics from questions, not charts. These are exactly the three principles my own tools are built on — because after a thousand e-shops, I know they work.

Questions or your own experience with this? Message me on LinkedIn — I am always happy to talk data.