When you checkout a remote branch using
git checkout, you are switching to a specific branch that exists on the remote repository.
However, just checking out a branch does not automatically update the files in your local working directory to match the latest on the remote branch. This is where
git pull comes in.
git pull is used to fetch and merge the latest changes from the remote branch into your current local branch. It combines the functionality of
git fetch (which downloads the latest changes from the remote repository) and
git merge (which incorporates those changes into your current branch).
So, when you run
git pull immediately after checking out a remote branch, it updates the files in your local working directory to reflect the latest changes present on that remote branch.