Git is a free, open-source version control system that tracks every change to your files, acting as a project's safety net. This allows developers to roll back errors and maintain a detailed history of modifications, which is foundational for modern software development.

The guide explains core concepts like branching, which lets teams experiment on new features without disrupting the main codebase. Collaboration becomes seamless as multiple people can work on the same file, merge changes, and maintain traceability through recorded timestamps and author names.

To push code to GitHub, you initialize a local repository with `git init`, stage files using `git add`, and create a permanent snapshot with `git commit`. The process links to a remote GitHub repository using `git remote add origin` before finally pushing with `git push origin master`.

Pulling code involves cloning a repository with `git clone`, creating new branches for edits using `git checkout -b`, and submitting changes via a pull request. Understanding the three zones—working directory, staging area, and repository—is key to mastering Git's tracking workflow.