America's Card Room -Ring Game Player Rankings

Does anyone who plays on America's Card Room understand or know where I can find out what the Overall Ring Game Rank means?
Its in account details/player info
Just wondering; until a few days ago it had me ranked as a Shark but now its just got a number posted. IDK what any of it means. Please help!

Better to request that from WPN support.

Yep; thanks. Was just hoping someone here knew so I don't have to waste half an hour talking to C.S.R since the sites I've dealt with in the past didn't seem to know much of anything about the poker sites or the features in them... Thanks anyway.