Git is an open-source version control system (VCS), used to track changes in computer files, especially source code in software, website, and app development. It’s considered the modern standard for software development, and extremely widely used. An individual project is known as a repository or “repo”, and the system is designed to allow collaboration between developers who can work on separate “branches” of the same project. Branches can be merged into each other, with one of them usually being designated end-product or “master”.  Github is a Web-based platform for storing, managing, and collaborating on Git repos.