1. None: The item doesn't have any priority level associated with it.
   
2. Low: The item has low priority level, implying it's impact is low or doesn't require action in the near future.
   
3. Medium: The item priority level is relatively high, implying it's impact is moderate or there is reasonable time before you need to take action.
   
4. High: The item has high priority level, implying it's impact is significant or it requires immediate action to avoid any major setbacks.

Edit priority level

1. Click the gear icon in the top-right corner to navigate to the Settings page.
   
2. Go to Custom Priority section under Project Settings.
   
3. Hover on the required item type.
   
4. Click the Edit link. The update window will appear.
   
5. Modify the required details.
   
6. Click the Update button. The changes will be saved.

1. You cannot delete the default priority levels.
   
2. The change will reflect in the items that are already associated with this priority level.

Custom priority

1. Click the gear icon in the top-right corner to navigate to the Settings page.
   
2. Go to Custom Priority section under Project Settings.
   
3. Click the +Priority button. The create window will appear.
   
4. Select an color to be associated with that priority. Select More Colors to assign a custom color to the priority. 
   
5. Enter a name for the item priority.
   
6. Provide a description.
   
7. Click the Create button. The new priority level will be added to the listing page.
   

You can associate your items to this priority level.

Delete custom priority

1. Click the gear icon in the top-right corner to navigate to the Settings page.
   
2. Go to Custom Priority section under Project Settings.
   
3. Hover on the required item type.
   
4. Click the Delete link. A confirmation pop-up will appear with the request to move associated items to another priority level.
   
5. Select another priority and confirm. The priority will be deleted and the items previously associated with it will be moved.

View and assign priority

1. Go to the required project.
   
2. Select an item. The item details page will appear.
   
3. Select an option in the Priority field.
   

You can assign priority level while creating the work item.