Under your "Follow Up Settings", there is an option for interval.
The message interval describes how many days after sending the previous follow up message that our system will wait before sending the current follow up message. For example, in the screenshot above, the second follow up message will be sent 5 days after the first follow up message.
After the follow up intervals are set, the intervals are displayed on the follow up series page for you to see.
What if my interval is set at "0"? When will my message send?
Where it generally is not recommended to set a follow up message interval to "0", if you decide to use this option for your interval the system will send the follow up message shortly after the previous follow up message. This typically occurs within moments, but could take a few hours to send.