Set Priority Levels (Problems, Changes, and Releases)
Administrators can create priority levels for all records (incidents, problems, changes or releases). Creating defined priority levels that can be assigned to incidents helps you and your team manage them in order of urgency, which helps ensure that incidents are resolved within a timeframe acceptable to customers.
Service Desk comes with default priority levels, which can be left as is or modified as desired (e.g., "This week", "This month", "This quarter"). Note that this article applies specifically to setting priority levels for problems, changes and releases. See Set Priorities and SLAs (Incidents) for more information.