Git is the most popular version control system in the world, used to track changes made in code over time.There are different ways to use Git, including the command line, code editors, and graphical user interfaces.Some common Git commands include: git --version, git init, git status, git add ., git commit -m 'message', git branch -m Main, git remote origin url, and git push -u origin main.GitHub, Bitbucket, and GitLab are some of the tools that use Git.