Chromebook 101: what’s different about the Chromebook keyboard?

One of the first shocks that you may experience when you buy your first Chromebook probably comes when you look at the keyboard. Where is the Caps Lock key? What (if you have a Pixelbook) is that strange-looking key between the Ctrl and Alt keys? What is that strange key in the top row that looks like a square with two straight lines next to it?
Google has tweaked the keyboard of its Chromebooks in ways that emphasize the way in which Chrome OS differs from Microsoft Windows and Apple macOS. And