GIT Git Is a Free and Open-source Version Control System. It is the most widely used version control system. Its work is the management of changes to documents, computer programs, large web sites and other collections of information. We basically save the initial state of our project on git and then whenever we make any change to the project we commit that change to git, so, that we can revert/ look back to previous project states anytime we want. Github Github is a website to host your git projects online. It is also a platform for making open-source contributions.