This is the first lesson in the study group, git is very important tool for someone who want to develop software.
Let say, you want to develop a software, but you don't do it yourself, you do it with your friends, so how you will manage your code?, share it with your friends?, and collaborate with your team?
It is hard if you don't have tools to help you to do that, and one of the tools to help you collaborate with your team to write code is Git.