Each license type includes a subscription for Support & Updates service, which has a 12 months period restriction.
It means that during the whole Support & Updates period you will have a full access to our helpdesk service and free updates for Publisher. We release such updates 2-3 times a month, and they usually contain both new features and bug fixes.
Note: You can use Publisher even if your Support & Updates period has expired. However you will no longer receive our free updates, and will lose your high priority status for the helpdesk service. You can renew this subscription at any time.