How to understand certifications (hip, heart, etc.)

[NewfFan]

Hey all-
I got such good feedback on my other question I have one more--how do you read the health certifications? The parents of the pup I want have been hip, elbow, and heart checked. How do I know whats "good" they got "good" on some things "normal" "clear" etc., how do I know whats the best to go with, and how do I know that I'm looking at legit results?
New to the world of big doggies, so I have some learning to do.

[People Whisperer]

"Good", "Fair" and "Excellent" are for hips only. For breed genetic disorders you want to see "clear" and for everything else like cardiac, elbows, patella, Cerf it's either normal or not