Git is a foundational tool for developers, enabling version control to track code changes, revert mistakes, and collaborate. It works with platforms like GitHub to store repositories. Key concepts include the working directory, staging area, and commits, which form the core of tracking a project's history.

Setting up Git involves configuring your identity and generating an SSH key for secure access. This key links your local Git installation to GitHub. The process includes commands like `git config` and `ssh-keygen`, establishing a secure handshake between your machine and the remote repository before you begin coding.

The daily workflow revolves around three commands: add, commit, and push. After editing files, you stage them with `git add`, save a snapshot with `git commit -m`, and finally `git push` to upload changes. Conversely, `git pull` fetches updates from GitHub, essential for team collaboration and keeping local projects synchronized.