Hey--This is Ben--I did the research. We used a survey-based tool called Brandlift that measures post-exposure lifts in recall and favorability against control

Hey--This is Ben--I did the research. We used a survey-based tool called Brandlift that measures post-exposure lifts in recall and favorability against control audiences using a defined competitive set. The tool automatically separates out the control audiences and the various test cells so there is no cross contamination. There's detail on the tool here: https://www.thinkwithgoogle.com/products/brand-lift/ https://www.thinkwithgoogle.com/products/brand-lift/ Happy to answer any other questions you have--glad you found it interesting...