When you create and activate a new experiment, the integration will create an experiment-specific code snippet. That code snippet will need to be dropped into the HTML body your email. You'll also need to put the Phrasee variant text AMPscript variable in the Subject field of your message.
Phrasee will optimize the variant batch proportions over the span of the testing period, with better-performing language variants receiving a greater proportion of the audience per batch.
Generally speaking, the Phrasee dynamic broadcast optimization integration with Journey Builder process is as follows:
Create your Content Builder email
Create and approve your Phrasee experiment language variants
Select the dynamic optimization settings and initialize your experiment in Phrasee
This includes setting the schedule for your experiment
Phrasee will publish the necessary code snippet into your Salesforce Marketing Cloud Content Builder library and create the required data extensions for the test
Drop both code snippet into your email and set the language variant variable
Use Preview and Test in SFMC to ensure you variants are pulling in properly
Finalize your journey flow
Add in the updated Content Builder email containing your code snippets
Add Random Split activity before the email and apply the required settings
Add a Wait step on the second path based on recommendations from Phrasee
Add in the updated email containing your code snippet a second time after the Wait step
Activate the flow
Phrasee automatically pulls the results for all variants throughout the test