Exclusion audiences: stop paying for people you already have

An exclusion audience is a list of people your campaign should not reach. It is one of the simplest ways to save budget.

Why exclude

Acquisition campaigns often spend part of their budget on people who are already customers — they click, they may even "convert" again, but you'd have had them anyway. Excluding them moves that spend to new people.

What the platform offers

From the Programmatic DMP release notes:

• Exclusion audiences for converters and existing customers (v1.3).
• One exclusion list shared by many campaigns — change the list once and every campaign follows.
• Exclusions apply on every channel the audience is synced to; the sync page shows past buyers left out on every channel.

How to set one up

1. Create an audience from Converters or upload a customer list.
2. Choose the type Exclusion instead of Retargeting.
3. Check the reach estimate and save.
4. Attach it to your acquisition campaigns.

Good exclusions

• Past buyers (from conversion tracking)
• Existing customers (customer list)
• Your own staff and test accounts

Check your results

After a week, compare cost per result before and after. If your conversion volume drops sharply, the exclusion may be too broad — for example a 180-day window when buyers return every month.

Related: Audiences: retargeting and suppression · Blacklists and placement controls