What this report tells you:
How efficient is the traffic being generated from various online sources? (which is another way of asking how well traffic from various sources converts visitors into buyers)
View traffic efficiency by drilling down to the top 3 levels: Source, Medium & Campaign.
Report data at Source level:
Report data at Medium level:
Report data at Campaign level:
Note: Make sure to adjust the filter by changing the user location (country level) to whatever is applicable to your business.
Link to the report: