https://learn.microsoft.com/en-us/training/modules/introduction-to-github/

Commits

Files are Untracked (git is unaware of it) or Tracked (git is aware of it).

Tracked files can be:

Unmodified: The file is tracked, but it hasn't been modified since the last commit.

Modified: The file has been changed since the last commit, but these changes aren't yet staged for the next commit.

Staged: The file has been modified, and the changes have been added to the staging area (also known as the index). These changes are ready to be committed.

Committed: The file is in the repository's database. It represents the latest committed version of the file.

Exercise

https://github.com/skills/introduction-to-github

Feedback:

Screenshots are a little out of date, but not confusingly so.
Waiting 20-30 seconds between performing action and receiving feedback is not ideal, although I do understand wanting to use GH Actions for it.