This might, on the face of it, seem like an odd macro to create — sound an alarm when the contents of the clipboard changes — but it has been a boon for me, for the simple reason that I know if I successfully copied something! It's also useful for when I'm copying a 2FA code from my iPad or iPhone to the Universal Clipboard, when I hear the alarm I know the code has reached my Mac.
Audio Feedback When Clipboard Changes.kmmacros (1.4 KB)
(Update: Managed to get the screenshot and macro file to attach!)