One channel learns from one channel

“How many channels” is a misleading question; the count alone says nothing. A company on one channel that measures every unit of spend is better off than one spread across four channels measuring none. But one channel has two problems: learning and dependence. One channel teaches you only its own truth; you never find out whether the message that works on Instagram also works in Google search. And when that channel’s cost rises forty percent one morning — and it will — there is nowhere to move.

Where the leak is. At both ends. On one channel the leak is the invisible opportunity: the customer may be cheaper somewhere else, and you don’t know. On many channels the leak is the unreasoned split: budget divided because “everyone’s there” or because the agency proposed it; no channel gets enough to learn, all of them work a little, none works well. The second case is more common and looks better on a report.

Three levels. At level one there are no ads, or one channel used irregularly. At level three there are two channels — typically one social, one search — and the budget is split at a ratio set at the start of the year; the ratio doesn’t move all year. At level five there are three or more channels and the budget moves on performance: add to the channel with the lower cost per lead this month, take from the one that’s rising; by month end the split differs from where it started, and the reason is written down.

A field example. A company ran four channels with a split set four years earlier: forty percent Instagram, thirty Google, fifteen each for two more. Cost per lead by channel showed Google search delivering leads at a third of Instagram’s cost, with twice the conversation rate. Nobody knew, because nobody had looked; the ratio wasn’t a decision, it was an inheritance. We moved ten percent, then another ten a month later. After three months the same total budget produced thirty-five percent more conversations, with the same agency.

The one-question check. Ask for the current split: “What share is in which channel?” Then the second question: “What was that ratio based on?” If the answer is “last month’s cost per lead”, good. If it’s “that’s how we started” or “the agency suggested it”, the ratio is a habit, not a decision. Habit is the most expensive ad strategy there is.

First action. Get one number per channel: cost per lead last month. Count phone and WhatsApp leads too; in most firms the cheapest lead is there and never counted. Side by side, one channel is usually twice the price of another. Next month, move ten percent of the budget from the expensive one to the cheap one — ten percent is small enough to reverse if you’re wrong, large enough to see the difference. Look again at month end. A firm that repeats these two steps for three months reaches level five without changing agency.

Growth 360 measures this point under “ad strategy and targeting”; in the healthcare version of the scan, this question is replaced by online booking, because in a clinic the booking infrastructure comes before channel variety.