Clients in Duplie are individuals or families that your organization works closely with.  Clients allow you (the administrator) to assign users/volunteers that can then view and log volunteer hours for that specific client.  Clients can have goals, custom fields to help you organize and plan.  Only administrators and assigned users can view and post updates to the client.  This is a perfect way to allow everyone working with a particular client to stay informed and log their efforts related to the client.

If your instance has clients enabled, you can view the list under Users and Clients.