Blog

Practical guides on diagnosing ad and store performance — written from the same methodology KPIHelm uses.

• September 18, 2026

  Meta says 40 sales. Shopify says 24. Neither one is lying.

  Open the ad platform and it reports one number. Open Shopify and it reports another, usually smaller, sometimes by half. The instinct is to decide which one is broken and trust the other — and that instinct is the actual problem, because the two numbers were never measuring the same thing. One answers "did my ad contribute to a sale?"; the other answers "what did the store record?" Both can be right at once, and a store that picks the wrong one for a given decision will misprice, misjudge a channel, or move budget for a reason that doesn't exist. This guide explains where the gap comes from, which number belongs to which decision, and how to tell an ordinary gap from one that just changed meaning. If the underlying problem is that your ROAS fell, start with [Your ROAS dropped on Shopify](https://kpihelm.com/en/blog/roas-dropped-shopify).

  Read the article
• September 11, 2026

  Your blended ROAS looks fine. One of your channels is losing money.

  A blended ROAS is an average, and an average is the one number that cannot show a split. It takes everything you spent across every platform, divides it into everything those platforms say they earned, and returns a single figure that describes no channel you actually run. When one channel is strong enough, that figure sits comfortably above your break-even while another quietly burns cash underneath it. Nothing looks wrong — because the winning channel is paying for the losing one, and the average has no way to say so. This guide is about finding the channel the average is hiding. If your ROAS has visibly fallen, that is a different diagnosis: start with [Your ROAS dropped on Shopify](https://kpihelm.com/en/blog/roas-dropped-shopify). If it looks healthy and the month still leaves no money, the cause may be margin rather than channels — that is [Your ROAS looks healthy. So why is there no money at the end of the month?](https://kpihelm.com/en/blog/break-even-roas-shopify).

  Read the article
• August 20, 2026

  Your ROAS looks healthy. So why is there no money at the end of the month?

  ROAS answers exactly one question: how much revenue an ad brought back for what you spent on it. It says nothing about how much of that revenue you kept. Two stores can run the same campaign at the same 3x ROAS and finish the month in opposite places, because everything that decides profit — what the goods cost, what shipping costs, what comes back as a return — happens where the ad platform cannot see it. This guide works out the ROAS *your* store actually needs, and what to check when sales look active and the bank balance doesn't move. If the problem is that ROAS itself fell, that is a different diagnosis — start with [Your ROAS dropped on Shopify](https://kpihelm.com/en/blog/roas-dropped-shopify).

  Read the article
• August 14, 2026

  Your ROAS dropped on Shopify. Here's how to find what actually broke.

  A falling ROAS is not a diagnosis — it's a symptom. ROAS is a ratio between what you spend on ads and what your store earns from them, which means it drops for two very different families of reasons: acquiring a visitor got more expensive, or a visitor became worth less after the click. Fixing the wrong side wastes weeks. This guide walks through the same split-first method KPIHelm uses to find where the money is actually leaking.

  Read the article