As a Game dev you might someday need to share your project with the general audience or collaborate with your game partner or if you are working with a client to do his project then you would need a version control system.
There is a Unity official Version Control but that is expensive while Gihub is almost free for you.
So thats the reason we will go with Github as compared to Unity Collab.
Step No.1: Create a Github Account (If you don’t have one)
You can create your account at github.com. Choose a username for yourself and Wolah! You have your account created!