Where can I see winning metric stats?

Whether you chose your test to automatically send to the winning version or pause to give you a chance to continue sending to the winning version, you can check out performance in the overview once the wi. The usual metrics cards and graphs will be displayed, with the A/B Tests section now at the bottom. 

Step 1: Click on the broadcast name

Step 2: Take a peek at the bottom of the summary - you'll see the Winning Metric, Engagement, Health, and Performance (ROI) based on the versions included in the test start to become available. The values will automatically update or you can select Update Now within the overview to manually update every 10 minutes. The chosen version will be clearly indicated by green star icons surrounding its metric value.