Updating Linux, warning from system: unsafe permissions on ‘root/.gnupg’

During the semi-automatic updates to my Linux MINT (v21.3, “Cinnamon”) O/S, I receive this warning from the “progress window” (a terminal-window view) that appears during the update”

Warning: unsafe permissions on ‘root/.gnupg’

Of course, the Warning does not tell me WHY the permissions are unsafe.

Confusingly, I can find numerous questions on this (and other) forums regarding the .gnupg file located at /home/username/.gnupg but I have yet to find any useful information re: standard (and safe!) permissions for the root/.gnupg folder, which of course is the one that is being flagged as having “unsafe permissions”

Being relatively new to the world of Linux, a bit of background information about

  • what the function of */.gnupg is;
  • why it appears in more than one folder; and,
  • what’s critical about its permission-levels,