Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git is lightning fast and has a huge ecosystem of GUIs, hosting services, and command-line tools.
Git is a distributed version control software. Version control is a way to save changes over time without overwriting previous versions. Being distributed means that every developer working with a Git repository has a copy of that entire repository – every commit, every branch, every file.