The owner had Ads Manager open on her laptop. She turned it so I could see.
"It says my audience is huge," she said. "So why is my calendar empty?"
The number on her screen was big. It looked like good news. But she did not know what it meant. Nobody had ever explained it to her.
So I walked her through it, one setting at a time. By the end, the big number made sense. And the empty calendar did too.
Here is how I use that number to check a med spa market.
What the audience size number is
Meta Ads Manager is the free tool you use to build Facebook and Instagram ads.
When you set up an ad, you tell Meta who should see it. Where they live. How old they are. Men or women.
Then Meta shows an estimated audience size. It is usually a range, like "12,000 to 15,000." That is how many people Meta thinks it can show your ad to.
It is a guess, not a head count. But it is a useful guess. And you can see it before you spend a single dollar.
Why I check it before every new clinic
I count women first, every time. I use the census for that. I explain the steps in How I count the women in a med spa's zip code in 20 minutes.
Then I open Meta and check the audience size. It is my second opinion.
The census tells me how many women live nearby. Meta tells me how many of them it can reach. If both numbers tell a similar story, I know the market is real.
Two numbers that agree are worth more than one number that looks big.
How I set it up, step by step
Here is exactly what I do. It takes about five minutes.
Start a campaign you will not publish
Open Ads Manager. Click to create a new campaign. Pick any goal for now. You just need to reach the ad set screen.
Nothing goes live until you publish. So you can look around safely.
Set the location
In the ad set, find the location box. Type in the clinic address. Then set the radius, which is the circle around the clinic.
For most clinics, I start around 10 to 15 miles. In a small town, I go wider. In a busy city, I go tighter. I explain how I choose in How far will a woman drive for Botox?.
Set the age and gender
I set the gender to women. I set the age to about 30 to 60. That is the group that books most aesthetic treatments in the clinics I work with.
Your best age range may be a little different. That is fine.
Leave interests alone for now
Meta lets you add interests, like "skin care" or "beauty." I skip them for this check.
Interests shrink the number fast. They can also hide good women who just never clicked on the right pages. For a market check, I want the plain picture.
Read the number
Now look at the right side of the screen. That is your estimated audience size.
Write it down next to your census count.
How I read what I see
Here is an example with made up numbers. This is not a real clinic.
Say the census shows 30,000 women aged 30 to 60 in the circle. Meta shows a range of 25,000 to 32,000.
Those are close. Good. The market is real.
Now, most of those women do not want a treatment this month. That is normal. Say about 1 in 100 is ready right now. That gives you about 300 women.
That is your real target. Not 30,000. Just the few hundred who are already thinking about it. I explain this idea fully in The 300 Women Playbook.
When Meta shows a much bigger number
Sometimes Meta shows a number far bigger than the census. Usually the circle is too wide. Or the location is set to a whole city instead of a radius.
I tighten the circle and check again.
When Meta shows a much smaller number
Sometimes the Meta number is far smaller. Usually an interest or an extra setting slipped in. I clear it and look again.
If it is still small, the town may just be small. That is okay. A small market can still fill a calendar with the right plan. I wrote about that in Small town med spa marketing.
What happened with the "huge audience" owner
Her number was huge for one reason. Her old ads had no circle. They covered the whole state.
So her ads reached women who lived three hours away. Those women were never going to drive in for a facial.
Her old ads also sent women to a form, not a booking page. Then someone had to call and chase. Facebook learned to find women who fill out forms, not women who book.
We fixed both. We drew a tight circle. We pointed the ads at a booking page that takes a deposit.
Her audience size went way down. Her bookings went up. Results vary, but that pattern is one I see often.
A big audience felt safe. A right sized audience was what worked.
Mistakes I avoid with audience size
Here is what I watch for.
- Chasing a big number. A huge audience is not a better audience. It often means wasted money on women too far away.
- Adding too many interests. They shrink the audience and can hide women who would book.
- Trusting one number alone. I always compare Meta with the census.
- Forgetting women who already booked. Once ads are live, I remove them from the audience. Every view should go to someone new.
- Thinking small means hopeless. A few hundred ready women is plenty to grow a clinic.
What comes after the check
Once the market checks out, I move on to the parts that make women book.
One clear package offer. A real guarantee. A booking page that takes a deposit.
Most clinics I work with start around $3,000 a month in ads. At that level, 40 prepaid bookings a month is a usual starting point. It is not the ceiling. As the offer proves itself, more budget books more women. Most clinics can take 80 to 100 new appointments a month without anything breaking.
The audience size check just tells you the women are there. Then the work is helping them find you.
The audience size check on one page
- Open Ads Manager and start a campaign you will not publish.
- Set a circle around the clinic, usually 10 to 15 miles.
- Set the gender to women and the age to about 30 to 60.
- Skip interests for this check.
- Write down the estimated audience size.
- Compare it to your census count.
- Shrink it in your head to the few hundred women ready this month.
The number on the screen is not your market. The women inside it who are ready to book are.
Quick answers
What is a good Facebook audience size for a med spa?
There is no single right number. I look for an audience that covers the women within a fair drive of the clinic, then shrink it in my head to the few hundred who are ready to book soon. That is the real market.
Where do I find the audience size in Meta Ads Manager?
Start a new campaign and open the ad set. After you set the location, age, and gender, Meta shows an estimated audience size on the right side of the screen. You do not have to publish anything to see it.
Why does Meta audience size not match the census?
Meta counts people who use its apps and are likely in your area. The census counts people who live there. The two will never match exactly, but they should be close enough to tell you the same story.