Definition
A custom audience is a group of people you already know, such as website visitors, customers or video viewers. It is the basis of retargeting.
Custom audience explained
Custom audiences can be built from pixel events, customer lists, app activity or engagement with your content. They are also used as exclusions and as seeds for lookalikes.
Example
Everyone who added to cart in the last 14 days but did not purchase.
See it in real ads
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