People-Based Identity Finds Twice as Many Matches as Cooke- and Device-Based Measurements: Thunder Study

Ad optimization vendor Thunder Experience Cloud conducted a much more elaborate research project, analyzing billions of ad impressions to compare cookie- and device-based identification with people-based identification from LiveRamp. They found that cookie- and device-based methods report twice as many unique individuals as people-based methods. In other words, people-based measurement shows that the ads reached half as many different people and each person received twice as many impressions as cookie- and device-based measurement reported. The gap grew larger as campaigns got bigger.