Navigate to the Attribution tab and select Attribution Report.

Click "View your overall marketing performance using multi-touch attribution"

View your overall marketing performance using multi-touch attribution

Look at the channel, tactic, or placement level to identify true efficiency from a de-duplicated view.

To see performance at a different level of granularity, edit the ordering of your tiers.

For example to see Facebook performance on the ad set level across campaigns, move the tier 4 value which houses all your ad sets up.

You can think of this feature as functioning like a pivot table. 

To quickly search across all tiers, use the search feature. 

For example if you want to quickly see performance for all your acquisition campaigns and have "acq" in your naming conventions, search for "acq" to performance of all lines that contain that value  --  either in aggregate or per tier. 

Attribution Report: Seeing Channel or Placement Level Reporting