Just shows how often you login.

They have some relation with the time spent on the games.
The more dots a player has next to his name, the more loyal member they have been.

You can proceed 1 or 2 levels initially in some days/weeks, but you will
need much more time (years) to get from 8 to 9, or 9 to 10.

Banned/demerited players level will decrease obviously.
info currently.

Mervin