This article will explain the components of the Coverage section
Coverage is showing us the potential opportunities for the account's growth.
Each category is clickable, and will display your conversions distribution Vs. the industry standard.
For example, Match Types will show your conversions distribution per Match type (by numbers and %), and in the "Industry Benchmark" you can see the delta between the account's activity and the industry standard.
Missed Conversion and CPA - Will indicate on potential number of conversions you could gain if you adjust to the industry standard, with its potential CPA.
NOTE: These are general recommendations based on best practices, that are not fitted to a specific industry.