An advertiser wants to determine the volume of ad exposures delivered to a single person across various platforms and devices. Which specific metric within a deduplicated report identifies this level of repetition?

Within Unique Reach reporting, the relevant metric is the one that measures how often, on average, a deduplicated person was served an ad across devices during the reporting period. Google defines Unique Reach: Average Impression Frequency as the average frequency at which an ad is seen by unique users across devices. A value of 1 means the average person saw the ad once, while a higher value indicates repeated exposure to the same person. That makes it the correct metric for identifying repetition of ad exposures, not just overall scale or clicks. Google Help+1