Email
Here you enter the email address of the person who should be notified when changes happen. It is possible to enter more than one email address here, just use ; after each email address to separate them.

Message group
Another option to send a message to more than one person is to use messages groups.  Here is more information about how to edit/create message groups in the admin section.

OPC action
In this section, it is possible to select an OPC action. However, if there is no OPC Action active, the option "None" HAVE TO be selected. Here is more information about how to edit/create OPC actions in the admin section.  

Title
Here you enter the title/headline for the message.