A/B-Winner Splits
You can use an A/B winner split test to automatically send the most successful message.
An A/B Winner split test involves testing messages with two or more groups to see which is most effective. After a set period of time, a winner is chosen based on preselected criteria, such as highest open rate or highest number of clicks. After the winner is selected, the winning message is sent to the remainder of your targeted contacts.

- Group A gets the subject line "Act Now! 25% Sale Ends Tomorrow"
- Group B receives the "25% Off Sale Extended Through Tomorrow" subject line.
You select Highest Open Rate as the winning criteria and the messages are sent out at 11:00 AM. You then set the winner to be sent at 2:00 PM. If at 2:00 PM, Group A has a higher open rate then Group B, the remaining 60% of the targeted contacts will be sent a message with the Group A subject line "Act Now! 25% Sale Ends Tomorrow".