What’s the difference between manual and automatic distribution?
Manual distribution is a one-time action. You set up the Distribution Manager and confirm with SEND. Right after the distribution is confirmed, the messages are delivered to customers and the distribution is over.
Automatic distribution works differently. In this case, confirmation in the Manager with SET LIVE only starts the distribution. In the Distribution Manager, you need to define what circumstances trigger the message delivery. For example, if a customer enters the segment called New Customers, send him/her a message. This type of distribution delivers messages automatically everytime when the trigger conditions are met.