Saved segments can be automatically synced to Facebook Custom Audiences to save time and streamline your workflow.
To get started you need
A Plus plan subscription. If you're unsure what your subscription includes, please contact your account manager or firstname.lastname@example.org
How to sync a segment to Facebook Custom Audiences
From your Account (bottom left) select Account Settings
Choose the Integrations tab
Select Manage Facebook Custom Audiences
Choose which ad account to sync the audience to from the drop down (top right)
To enable syncing for a segment click Sync
The segment will now automatically sync to the chosen ad account.