plz tell me?

The star and the points you see beside your name is your reputation or rating in myLot community. I see you got 77/100 now not bad. It doesn't really mean whether you are a quality poster or not, its just show how people see your posts. It goes up when you are rated +. However, some people here really don't care about rating. Don't worry too much as the stars have nothing to do with our earnings.