Meta ads audience segments: set them up before Black Friday

Short answer: audience segments are an ad account setting where you tell Meta who your existing customers are and who has already engaged with you. Once they're saved, Ads Manager can split a campaign's results into New audience, Engaged audience and Existing customers. You set them under All tools → Advertising settings → Audience segments, using custom audiences built from your website, app, offline activity, catalog or customer lists. If the breakdown is missing from your Ads Manager, either the segments were never defined or the campaign isn't a type that reports them.

I work on Everix. This week someone asked under a YouTube video why the New, Engaged and Existing breakdown shown in the video wasn't in their own Ads Manager. Both causes take a few minutes to fix, and October is the month to fix them: in November a campaign can post its best ROAS of the year while much of the spend goes to people who already buy from you.

Where to set them

• In Ads Manager, open the All tools menu and go to Advertising settings. You may need to open Ad account settings first. Find the Audience segments section.
• Existing customers: people who have bought from you. A website custom audience built on the Purchase event (180 days is a common window) plus a customer list of past buyers covers most stores.
• Engaged audience: people who know you but haven't bought, such as website visitors and your email or SMS list.
• New audience is everyone else. You don't define it; Meta works it out from the other two.

Which audiences Meta takes

Meta's own description lists the sources it reads the segments from: custom audiences built from website activity, app activity, offline activity, a catalog or another custom list. Engagement audiences are not on that list.

The engagement ones are where most setups go wrong. They sound like the obvious fit for Engaged audience, so people add their Instagram engagers, the segment ends up thinner than they think, and those people get counted as New.

Where the breakdown shows up

In Ads Manager, open Breakdown → By delivery → Audience segments. It reports on sales campaigns, and Meta lists it for Advantage+ leads campaigns too; a campaign with another objective may not offer it. Practitioners who have tested it, such as Jon Loomer, note that it works going forward from the day you save the segments, so setting it up in late November leaves you no October numbers to compare against.

What to read before Black Friday

• The share of spend going to Existing customers. A sales campaign is free to find buyers wherever they're cheapest, and people who already bought from you can be the easiest buyers to find. If that share is high, much of the campaign is re-selling to your own customers.
• Cost per purchase for New audience against Existing customers. This is the number your growth actually runs on. A campaign with a strong blended ROAS can still be paying far more for each new customer than for a repeat one.
• How both move once November spend goes up. If the Existing share climbs as you raise the budget, the extra money is buying sales you were likely to get from email anyway.

Define Existing customers and Engaged audience now, with website and customer-list audiences, not engagement ones. Then check one thing every week into November: how much of the spend and how many of the purchases are new customers.

If the blended number looks fine but you're not sure what a sale costs you to break even, start with break-even ROAS.

How Everix handles it

Everix builds its lanes with Advantage+ audience on unless you set an age range, so existing customers can be in the mix the same way they are in any sales campaign. It judges each ad and ad set on cost per result against your target, around the clock; it does not read the audience segments breakdown. That split stays a view you set up and check in Ads Manager, and it's worth having before the busiest weeks of the year.