Git is a source code management system that keeps track of the changes made to their codebase and collaborates with other team members. It is commonly used for source code management in software development, but it can track changes to any set of files.

In a version control system, every time a file is modified, a new version is created and saved. This allows users to go back to previous versions of the file, and makes multiple engineers collaborate simultaneously without overwriting each other’s changes.