Google AdWords displays Ad Scores: Pscore, mCPC & thresh but Google search results shows more listings parameters and factorials.

So what does this G scores mean on AdWords or normal Google listings?
- Pscore: 0.00101
- mCPC: 10.0000
- thresh: 0.0001

mCPC might answer the minimum cost-per-click for the ad is $10? The Pscore might be popularity or permanent score.