Apps · The Apps window and launcher
What does the ? button in the Apps window explain?
Short answer: The ? button opens a plain-English glossary of every safety badge, update label, install-folder chip and status in the Apps window.
The ? button in the toolbar opens a small glossary that explains, in plain English, every safety badge, every update label, every install-folder chip and every status you might see in the Apps window.
It's the quickest way to check what a badge means before you move an app. The same meanings are covered in what the safety badges mean.