You can create a Facebook Custom Audience (CA) from a Localytics Audience. This allows you to
        plan and execute app re-engagement campaigns on Facebook. 
        
            First, create the
                    Audience you want to send to Facebook.
         
        - 
                Navigate to the Audiences screen and click the Actions menu.
            
- 
                Select Remarket on Facebook.
            
- 
                If needed, log into Facebook. You must use the account that has administrative
                    privileges for the ad account you want to use to remarket.
            
- 
                Choose the ad account you want to use and click Go.
                    You're done!
                This process takes about an hour on Facebook's side. After an hour, check your
                    Facebook ads manager. The remarketing audience appears in your Facebook Ads
                    Manager Audiences under the name of the Localytics Audience + the date
                    and time you sent the Audience. If you get an error, please contact
                    Support. Now, you can use the Audience you sent to serve Facebook
                    ads.