A clean criminal record is something no one should take for granted. For
example may employers ask on job applications "Have you ever been
arrested?" If you have been arrested and are eligible for an expunction
but don’t avail yourself of that opportunity, the truthful answer
to that question is YES.
However, if you have an arrest expunged, you can answer that question NO,
and if a someone attempts to verify the information on your application
(more and more employers complete background checks) they will not have
access to the information.