To create a Facebook custom audience, go to the Audiences section of your Facebook Ads Manager. Then click Create Audience and select Custom Audience from the drop-down menu.
For fb page custom adience, goto the audiences section of your fb ads manager. Then click create audience and select custom audience from the drop down menu. Create a custom audience in FB ads manager.
To create a Facebook custom audience, go to the Audiences section of your Facebook Ads Manager. Then click Create Audience and select Custom Audience from the drop-down menu.