How to switch between different branches in your repository.
After creating a new branch, you need a way to switch to it so you can start working on it. The `git checkout <branch-name>` command is used for this purpose. When you switch to a different branch, Git updates the files in your working directory to match the snapshot of the latest commit on that branch. This allows you to completely change contexts. For instance, if you switch from the `main` branch to a `bug-fix` branch, your files will change to the state they were in when that branch was created, allowing you to focus solely on the bug fix. You can also create and switch to a new branch in a single command using the `-b` flag: `git checkout -b <new-branch-name>`. This is a very common and convenient shortcut. Being able to effortlessly switch between different lines of development is a core part of the Git workflow, enabling you to manage multiple tasks concurrently.