Sometimes it is necessary to provide access to your user lists for the use in other advertising accounts. Two options are available — to send the file with data to upload an audience to the recipient or to provide (to share) access to your, already uploaded, list. Let's refer in detail on the second way.
Granting access is possible only for the lists you’ve uploaded by yourself and which you’re the owner of. In other words, you’re not able to share the lists provided to you from other accounts.
The table shows all the lists available to you. It’s possible to share only those of them which have “You” in the “Owner”.
Select “Share segments”.
Select “Generate access key”.
Copy the key or the link and send to the desired recipients.
Audiences, shared by you, will be ready for use after the activation.