Easy access of each change in a separate file with date/time stamp.Easy to view all versions in one go (or) easy way to compare two different files at once.Very helpful when you have multiple programmers working on same project & they are not able to keep track of their code modifications. I am using this tool while developing Android application which has more than 100k lines of codes. It is very useful as it helps me keeping track of my previous modification that i made to any particular line of code along with its current status.