Git uses your username to associate commits with an identity. The git config command can be used to change your Git configuration, including your username.
Now explain with an example.
Suppose you want to give a username and email id to associate a commit with an identity so that you can know who has made a particular commit. For that I will use:
git config –global user.name “Your Name”: This command will add a username.
git config –global user.email “Your E-mail Address”: This command will add an email id.