The first and simplest to understand is the Stallion Match also referred to the 20/20 Report. This report looks at 20 key crosses within the past 4 generations and determines how many graded stakes winners appear in the pedigree within the 4 generations.
Historical data tells us that the more the better but specifically if you have at least two instances of 20 graded stakes winners within any of the 4 quartiles on the report, you have a very good mating. I have seen as many as 30 graded stakes winners within the most recent four generations.
The second report is the impact analysis which assigns a color coded grade to the various key crosses within the pedigree, green being very good and gold/yellow being excellent. Crossed that are highlighted in red should be avoided. In addition this report will tell you how many black type winners appear in the cross and will also give you a pretty good analysis of whether you are breeding a sprinter or route runner through the distance profile of the report.