We recently exposed the Device column in the Click Performance Report. The Device column can have TABLET, HIGH_END_MOBILE or DESKTOP as its valid values. This is a segmentation column, so requesting it will prevent zero impression rows from being returned. If you have migrated to Enhanced Campaigns, then this column can be useful in finding out how your ads performed on various platforms, and adjusting your mobile bid modifier accordingly.

If you face any issues with the above changes or have any questions about this feature, you can ask us on our developer forum, or at the upcoming GDL Office Hours with the Developer Relations team.