Git is a distributed version control system. No, you dont need to know what that means to use this guide. Think of it as a time machine: Subversion or CVS without the cruft.If you make a lot of changes, but decided you made a mistake, this will save your butt.This guide is for people who want to jump to any point in time with their project/game/whatever, and want something to use for themselves.

via Git for the lazy – Spheriki.