What Is The Global Site List?

Just wondering if anyone could explain what the global site list is since i don't fully understand what exactly it does?!

Thanks

There is a youtube video made by s4nt0s and A LOT INFORMATION on this forum related to this.

Please use forum search before asking!!!!

I read the forum everyday i must have missed it thanks for reply though i will find it

Watch the first video in this thread: https://forum.gsa-online.de/discussion/11/gsa-search-engine-ranker-video-tutorials-updated-8-17-2012#Item_2

Thanks s4nt0s