Select your new campaign in the left pane, or double-click it in the right pane.
Select the list view using the icon:
Click New …
You can specify the Title, Name and type of experience to be created; in this case, Test&Target Offer.
Test&Target experiences are not currently listed in the MCM. They can be accessed from the Websites console, under Campaigns.
See Integrate with Adobe Target for full details.