1) Locate and open the respective Journey that you would like to A/B Test.
2) Once in the Journey Editor, click the +Add Variant option to begin setting up your A/B Test.
3) A/B Tests can be configured to run on the Journey's Layout, Styles, Message, and Settings sections.
4) Configure the Journey Variant that you would like to be run against the existing Journey. Admiral recommends limiting your Variant to five (5) changes.
5) Ensure the Variant's Layout, Styles, and Message capture the information you would like to A/B Test.
6) Navigate to the Variant's Settings to configure its Name and Sampling Rate. Admiral recommends a Sampling Rate of 50 percent. 
7) Save your Journey Variant to begin A/B Testing.
8) Improvements to the Journey based on A/B Testing are automated and will take place without manual action.