Acquire New Customers: The Meta Setting Most Brands Ignore

Most advertisers spend hours debating creative, bidding and attribution windows. Very few ever open one setting that decides who their budget is actually spent on.

It sits in the ad set, under “Customer lifecycle strategy”, and it defaults to “Get conversions from all audiences”. The alternative is “Acquire new customers”. Right underneath it, Meta warns that choosing it may increase your cost per result. For most media buyers, that sentence is where the thinking stops.

That’s a mistake. The setting doesn’t make your advertising worse. It makes your dashboard more honest, and it forces you to answer a question most accounts avoid: how much of what you’re paying for would have happened anyway?

What the Setting Actually Does

You’ll find it in your ad set settings. Scroll to “Customer lifecycle strategy”, open the dropdown, and switch it from “Get conversions from all audiences” to “Acquire new customers”.

Meta also needs to know who your existing customers are, so you label custom audiences for it. Typically that’s your pixel or Conversions API purchasers over the last 180 days, plus your full customer list from your CRM or email platform. Meta suggests eligible audiences and flags any that haven’t been labelled yet, like the prompt under the setting above. It’s worth checking what it picked.

With “Acquire new customers” selected, Meta shifts delivery toward people who aren’t in those audiences. Your budget stops being spent on showing ads to people who have already bought from you, and moves to people who haven’t.

That sounds like a small targeting tweak. In practice it changes what the algorithm is optimising for, because it removes the easiest conversions Meta has access to.

Why the Default Quietly Works Against You

Existing customers are the cheapest conversions in any auction. They know the brand, they trust it, they’re already on your email list, and many of them are coming back regardless. When Meta is asked to find purchases at the lowest cost, it naturally drifts toward them. Then the attribution window gives the ad credit for a sale that was already on its way.

Here’s a simple example. Say you spend $100,000 a month on Meta. On the default setting, 30% of that ($30,000) ends up reaching existing customers at a $70 CPA, which is about 430 purchases. The other $70,000 goes to prospecting at a $115 CPA, about 610 purchases. Ads Manager shows roughly 1,040 purchases at a blended CPA of around $96.

Now switch to “Acquire new customers”. All $100,000 goes to prospecting. Because the extra budget has to reach further into colder audiences, CPA rises to, say, $130. That’s about 770 purchases. Ads Manager now shows 270 fewer purchases and a CPA that’s 35% worse. Most people would switch it straight back.

But look at what those existing-customer purchases really were. If 80% of those 430 people would have bought anyway through email, organic search or typing in your URL, the ads only caused about 86 of them. That $30,000 was buying incremental purchases at roughly $350 each. Moving it into prospecting bought around 160 extra purchases from people who had never bought before, at under $190 each.

The dashboard got worse. The business got better. Fewer sales were being claimed, and more were being created.

Why It Gets Overlooked

The first reason is simple: it makes every platform metric look worse. CPA goes up, ROAS goes down, and reported purchases drop. If your media buyer or agency is judged on Ads Manager numbers, turning this on looks like a performance problem within a week, and it usually gets reversed before anyone checks what happened in the store.

The second reason is that the damage from the default is invisible. Nobody gets an alert saying a third of the budget is being spent on people who were going to buy anyway. Those purchases show up as conversions, often at an excellent CPA, and the campaigns that capture them look like the best in the account.

The third reason is that attribution rewards it. Every attribution window, whether it’s one-day view or seven-day click, is a timing rule, not a causal one. A returning customer who sees an ad and buys the next day is counted the same as a new customer who would never have found you without it. The platform has no reason to separate the two, so most reporting doesn’t either.

The result is that many accounts slowly turn into expensive retargeting machines, and the numbers make it look like success.

The Trap of Switching It On Halfway

A common approach is to test it on some campaigns and leave others on all audiences. That feels cautious. It actually creates a new problem.

Once most of your campaigns exclude existing customers, the one campaign that doesn’t becomes the only way Meta can reach them. It will find that audience fast and spend heavily on it: a small group of people, shown the same ads again and again, converting at a very low CPA. That campaign quickly becomes the best-looking campaign in your account.

Its blended CPA hides everything. A campaign might show a $70 CPA overall while its prospecting CPA is well above your other campaigns, because the cheap existing-customer purchases pull the average down. And because Meta attributes the full order value to the ad, a returning customer who adds a low-priced item to a larger basket can make the campaign’s reported revenue look far bigger than what it actually sold.

This is the same mistake as the default setting, just concentrated into one campaign. If you compare campaigns on platform CPA or ROAS while some exclude existing customers and some don’t, you aren’t comparing performance. You’re comparing audiences.

How to Measure It Properly

If you judge this setting in Ads Manager, it will always lose. CPA will rise, because you’ve removed the cheapest purchases from the average. That’s the setting working, not failing.

The right numbers live in your store. Start with cost per new customer: total ad spend divided by first-time customers from Shopify or your backend. Then look at the new-customer ratio, total orders, and store-level ROAS or MER. If you can, go one step further to contribution margin, because a campaign that sells low-margin items to people who were buying anyway can look strong on revenue and still lose money.

The most revealing check is comparing two changes side by side: how much Meta’s reported purchases dropped, and how much actual store orders dropped over the same days. If Meta loses hundreds of purchases and your order count barely moves, those purchases were never caused by the ads. They were free conversions, and you were paying for them.

Give it at least two to four weeks, keep sale periods out of the comparison, and if you can, hold one market or a matching set of campaigns on the old setting. A before-and-after read is a good start. A holdout is what turns it into proof.

Where Existing Customers Still Belong

None of this means existing customers don’t matter. They’re usually the most valuable people you have. The point is that you shouldn’t reach them by accident, through whichever campaign happens to allow it.

Most brands already have cheaper ways to reach past customers: email, SMS, and organic social. Paid ads to them only make sense when they add something those channels don’t. A new collection launch is the best example. An always-on ad reminds a loyal customer about a brand she was coming back to anyway. A launch ad tells her something she might not know yet. That’s far more likely to change what she does.

The better structure is to give existing customers a deliberate, capped budget, such as a separate warm-audience campaign at around 10–15% of spend, and measure it on its own. Everything else optimises for new customers.

There’s one more gap to plan for. Once Meta is pushed toward new people, it sends more first-time visitors to your site, and most of them won’t buy on the first visit. If nothing follows them up, you’re paying to start conversations nobody finishes. Retargeting engaged visitors who haven’t purchased yet belongs in the plan from day one.

The Bottom Line

“Acquire new customers” is one of the most useful settings in Meta, and one of the least used, because it makes the numbers most people look at go the wrong way.

But the job of paid media isn’t to collect credit for customers you already have. It’s to find the ones you don’t. Left on the default, Meta will keep circling your existing customers, because they’re the easiest purchases to claim. Turn this on, expect your platform CPA to rise, and judge it on what happens in your store. If orders hold and cost per new customer falls, the setting did its job, even if Ads Manager says otherwise.