Well, there are a number of default keyboard shortcuts that you should memorize for sure. From taking an instant screenshot ...

To customize keyboard shortcuts on a Chromebook, use the keyboard shortcut Ctrl + Search + S to open the keyboard shortkeys editor (available for ChromeOS version 123 or later) and edit the shortcuts.

Google’s April updates include custom keyboard shortcuts and mouse button actions for Chromebooks as well as changes for the Pixel Watch and Pixel Phone.