Difference between ground and common ground

Hello i am noob and hoping someone can help me understand the differrence between the two. i am trying to build custome stick and pcb says it has common ground. what does it mean? please help

Common ground ANY ground point on pcb can be used with the signal…where regular ground controllers there are ground points that have assigned signal points that cannot be changed…not suited for dual mods…

so can cimmon ground can be replicated with something? i am planning to dual mod my stick and pcb had common ground on it, however i would like to use something outs for common ground.

Just use the suggested pcb’s to mod with and you will be fine. I don’t know if you can do what you are asking.