The expensive channel was not the one that paid off

At one client the marketing numbers were spread across five places. Every channel had its own screen, every screen had its own definitions, and nowhere did it say what they brought in together.

When we laid them side by side, something came out that nobody expected. The advertising on Google was expensive and returned little. TikTok was cheaper and brought in far more clicks.

That is the kind of finding that moves a budget. But only if you draw the right conclusion from it, and that is subtler than it looks.

Why you normally do not see this

Every platform shows you its own performance, and every platform looks good in its own screen. That is not bad faith, it follows from the fact that a platform only knows what happened at its end.

Google sees clicks on Google. TikTok sees views on TikTok. Your mail platform sees opens. None of those three sees your sales, so none of those three counts what actually counts.

Worse: sometimes they all count the same sale. If someone sees an ad, looks something up later, and buys later still through an email, every platform claims that customer. Add the reports up and you have more sales than you really had.

What to do instead

You bring the cost of each channel and your actual sales together in one place, and you calculate at the level where you make decisions.

For an SME that does not have to be perfect. You do not need a complicated attribution model. You need an honest, simple rule that you apply consistently, so you can compare periods with each other.

What works in practice: look at the cost per channel and the revenue booked within a fixed window after contact with that channel. Seven days, thirty days, whatever fits your sales cycle. Choose that window once and do not change it.

That is not exact. But it is consistent, and consistent is what you need to see a shift.

Clicks are not revenue

Now the catch in the story above, because I do not want to make it prettier than it is.

That TikTok delivered more clicks more cheaply is a fact. Whether those clicks also earned more is a second question. Cheap clicks from people who do not buy are more expensive than expensive clicks from people who do.

That is why every report I build carries a chain instead of a number. Cost, clicks, visitors, purchases, revenue, margin. Each step with the percentage that survives from the previous one.

Then you see not only which channel is cheap, but also where people drop out. And that is usually where your gain sits, because a channel that brings people in cheaply but converts badly is not a channel problem but a landing problem.

The numbers you need alongside

Three things that often get forgotten.

The margin, not the revenue. A channel that sells low-margin products can produce higher revenue and still earn less. If you steer on revenue, you steer the wrong way.

The repeat purchase. A channel that brings customers in expensively but delivers customers who stay will beat a cheap channel with one-time buyers over time. You only see that when you follow customers across several months.

And the sale that would have happened anyway. Someone who searches for your brand name and then clicks your ad would probably have found you without that ad. That is the most expensive habit in a lot of advertising budgets.

What you do with the result

Do not cut a channel straight away. That is the reflex and it is rarely the right move, because channels reinforce each other and you do not see that interplay in the numbers.

What does work: shift in steps and measure the effect. Take twenty percent away from the expensive channel, put it on the cheap one, and look four weeks later at your total revenue, not at the channel figures. If the total stays level or rises, you repeat it.

That is slower than one big decision, but it is the only thing that teaches you what is really happening.

What to put an alert on

Once you have the chain in view, you can put a signal on it. Cost per purchase above a threshold, conversion below a threshold, a channel that deviates by more than a set percentage from last month.

Then you no longer have to look at it. You hear about it when something shifts, instead of establishing it at the end of the month.

The claim

As long as your marketing numbers live in five screens, every channel is selling itself to you. You can only decide once they sit in one table, with your margin next to them.