Adding files is how you move changes from the working directory to the staging area. This two-step process helps you control exactly what gets committed. You can stage all files at once or be selective about which specific files to include.
Staging Changes
`git add .` stages all modified files, `git add filename` works for specific files. The staging area is your "pending changes" zone—this gives you a chance to review and organize before making a commit. Any file in the staging area will become part of your next commit.
$ git status
$ git add .
$ git add README.md
my-file.txt
$ git status