Please can come one explain to me what this means ?

Hello,

The "Clubs" column lists the number of clubs whose managers have visited the country.
The "Pot. for potential and (8) it's the level of the youth academy" column lists the potential found by managers who have a youth academy at the same level as yours.

Hello,

No, not to my knowledge ...
But on an old subject, the webmaster mentioned that the probability of finding a "big" potential was the same, whatever the country.