When a user interacts with an A/B Test message, their next destination action is up to you. With the initial release of A/B Tests you had the choice to direct users to one of four actions:
Today we are adding Landing Page to the Message Action options. A Landing Page is HTML content that appears as an overlay above your app. Simply choose the action, then customize one of our standard templates, or upload and edit a Landing page template of your own.
See our A/B Test Content setup documentation for details.
Message Action Options: