Custom Audiences is an ad targeting option that lets you find people who already know or have engaged with your business.
This type of targeting is a powerful tool for re-marketing, reaching possible repeat customers, increasing your following, increasing app engagement, or creating lookalike audiences.
A minimum audience size of 1,000 is required to target Custom Audiences in an ad group.
Learn about the different ways you can create a Custom Audience:
For more information on how to create each type of custom audience, watch the video below.