Binary package “libnotify-doc” in ubuntu mantic

sends desktop notifications to a notification daemon (Documentation)

 A library that sends desktop notifications to a notification daemon, as
 defined in the Desktop Notifications spec. These notifications can be
 used to inform the user about an event or display some form of
 information without getting in the user's way.
 .
 This package contains the documentation for libnotify4 in
 /usr/share/gtk-doc/html/libnotify and the notifications specifications in
 /usr/share/doc/libnotify/spec/.