+`M-x debbugs-gnu-usertags' shows existing user tags on bugs. In order
+to show bugs with known numbers, `M-x debbugs-gnu-bugs' could be used.
+
+If you prefer the listing of bugs as TODO items of `org-mode', you
+could use the commands `M-x debbugs-org', `M-x debbugs-org-search' and
+`M-x debbugs-org-bugs' instead.