This API part enables you to export identifiers included in the audience segment.
The API makes it possible to get GAID (advertisingId), IDFA, CustomUserID, and other identifiers that can later be used for advertising targeting and be load to a third-party analytics system.
Only account owners and users with the granted export permission can export segments from the account. For details, see User management.
To learn how to create and analyze segments, see the docs
You will get CSV files compressed to gzip. Large files can be split into multiple pieces. Each file has a title with the names of requested identifiers. You can exclude the title if needed.