The monitor issues feature allows users to subscribe to
certain issues and hence get copied on all notification emails that
are sent for these issues.Depending on the configuration, sending a
reminder to a user about an issue can add this issue to the user's
list of monitored issues. Users who reported the issue or are assigned
the issue typically don't need to monitor the issue to get the
notifications. This is because by default they get notified on
changes related to the issue anyway. However, administrators can
change the configuration to disable notifications to reporters or
handlers in specific scenarios.