Meta Ads glossary

What Is Custom Audience?

Definition

A Custom Audience is a Meta audience built from people who already interacted with a business or appear in an eligible first-party data source.

How Custom Audience Works

Sources can include customer lists, website or app activity, video engagement, lead forms, Instagram activity and other Meta interactions.

A Simple Example

A business can create an audience of people who visited a service page in the last 30 days and use it for retargeting or exclusion.

Why Custom Audience Matters

Custom Audiences connect advertising to known behavior and can support retargeting, suppression and seed audiences.

Common Misreading

Audience membership does not prove purchase intent, and small or stale audiences can limit delivery. Customer data must be used with proper permission.

Go deeper

Continue with the practical guide

The glossary gives you the definition. The guide covers implementation and decision-making in more depth.

Build and use Custom Audiences →