Adding vendor contacts allows you to set up ordering notifications for specific contacts at that particular vendor. It also serves as a bank of contact information if you or a team member need to speak with representatives of that vendor.
Note: Creating/editing contacts is only available to admin users.
The notification method dictates how they are notified of order activity. The notification type dictates what kind of order notifications they will get with the chosen method. If you select none, they will not receive notifications.