The instruction directs a recipient to disregard a prior message. For instance, a user might send an updated document and precede it with a note indicating that the earlier version should no longer be considered valid or relied upon.
This directive minimizes confusion and ensures individuals work with the most current information. Its usage has likely increased with the proliferation of digital communication and the ease with which documents can be revised and re-sent. This avoids errors stemming from outdated details.