However, the Delivery item after the script didn't have clear directions on how to configure. I had the following options checked, and I got an error saying, "The transition does not specify a content identifier". How should the delivery object be configured to send out correctly?
It works for me on the second option. (to define everything inside Initialization Script of the winner delivery activity.)
The first option (to create a JS activity right after the Wait activity in the winner transition)A/B testing doesn't work for me. It always sent to campaign A even campaign B has higher open rate. My question is, do I need to configure the Delivery item if I use this method? This tutorial A/B testing doesn't mention anything about the Delivery item configuration, I assume there is no configuration needed?
There are multiple ways to calculate and assign a value to the deliveryId variable. Once way is to create a JS activity right after the Wait activity in the winner transition. This page explains the aforesaid process A/B testing
Another way is to define everything inside Initialization Script of the winner delivery activity. Here you can copy the entire code of JS activity into the Initialization script section of winner delivery Advanced tab.