Volunteer Managers are documented in Salesforce to help staff track their assigned caseloads.
This article explains how to edit the Volunteer Manager field.
From the Volunteer's Contact Page
1. Scroll down to the Volunteer Information Section.
2. Click on the pencil icon next to Volunteer Manager.
If there's already an assigned Volunteer Manager, click the X.
3. Search for and select the Volunteer Manager.
4. Click Save.
You've assigned a Volunteer Manager to that volunteer.
