Suggested readings: Use Facebook Custom Audiences, Facebook Custom Audiences Troubleshooting, FAQ for Facebook Custom Audiences
After you launch your journey, you can see the Arrived and Reachable figures on the Facebook element on the canvas.

- Arrived displays the number of users who have arrived at the Facebook element.
- Reachable displays the number of reachable users on Facebook, considered as those who have an email address.
- Dropped displays the number of unreachable users on Facebook.