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October 8, 2026

"How Did You Hear About Us?" — The Cheapest Marketing Test You're Not Running

We spent a week posting a clinic's content into dozens of Facebook groups. Then I asked if it worked, and nobody could answer. The fix turned out to be one question on a form.

marketingsmall businesscustomer acquisitionlessons learned

For about a week we posted a small wellness clinic's content into local Facebook community groups. Some days we reached ten groups at once. Then I asked a simple question: is any of this bringing in customers? Nobody could answer it, not the booking system and not the analytics. The fix turned out to be the oldest question in business: "How did you hear about us?"

What happened when we checked the numbers

We pulled the clinic's booking records for the nine days the group posting had been running. Here is what they showed:

  • 11 bookings in the window, 9 from new clients and 2 from returning ones.
  • 24 new contacts, and 16 of them were just a phone number with no source attached.
  • 7 days of group posting, adding up to 77 group posts.

The 11 bookings matched the pace of the 9 days before the posting started, which had 12. So the posts hadn't moved the number in any way we could see.

The detail that mattered more was where the bookings came from. None could be tied to Facebook for certain. Two might have been, because they arrived directly within two days of a post. The other nine came through the website, and from there you can't tell whether someone saw a Facebook post first, searched on Google, or heard about the clinic from a friend.

Why can't my analytics tell me which channel works?

Most small businesses run into this sooner or later. People rarely go straight from a post to a purchase. They see something on Facebook, think about it for a day, then search the business name and book through the website. Your tools record the last step and miss everything before it.

You can spend money on tracking links, tags and attribution software. For a business with a few dozen customers a week, that is usually overkill, and it still misses the friend who mentioned you at dinner.

The cheapest fix: ask "how did you hear about us"

The recommendation from the review was plain: add one question to the intake form. It goes on the form clients already fill in before their appointment, so it adds no extra step.

Here is why it works so well for a small business:

  • It costs nothing. You edit a form field once.
  • It catches word of mouth, which software can't see at all.
  • It answers the question you actually have. You don't need to know how many people clicked. You need to know where your customers come from.

The client approved it the same day, and it's now going onto both of the clinic's intake forms.

How to set it up well

Keep the answers simple

Offer a short list of options rather than a blank box: Facebook group, Google search, friend or family, Instagram, other. Free-text answers like "online" tell you very little.

Make it one tap, not a chore

Put it near the end of the form, after the questions that matter most. If the form already asks a lot, one extra tap won't stop anyone.

Look at it monthly, not daily

One week of answers is a handful of anecdotes. After a month or two you'll see a real pattern, and you can decide where to spend your time.

What this taught me about measuring marketing

I'll admit it: we built the posting machine before we built a way to tell whether it worked. The posting runs nearly on its own now, and the measuring only started once someone asked. That order should have been the other way around.

If you're putting effort into a channel, decide before you start how you'll know whether it's paying off. Sometimes the answer is a dashboard. For most small businesses it's one honest question, asked to every customer.

Before you spend another week on a marketing channel, add "How did you hear about us?" to your form. Your customers will tell you what's working.