Confusion on Group Tracks, Auxes, Fx tracks

Hi all, i have seen different terminology around, videos on youtube explain mixing techniques using busses, auxes, etc. But is a buss track the same as an FX channel? Or Group track? Say I want to group all drums to a buss, will that be a group track (and be called drum buss?). What about auxes? Are they the same as FX tracks and used only for effects like reverb and delay?

Thanks a lot everybody for the help!