storesalesmeasurement
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Google and Mastercard reportedly teamed up to track offline sales (update)
Last year, Google launched a tool called "store sales measurement" that can tell whether an online ad is effective based on real-world purchases in the US. The tech giant didn't expound on how it built the tool and how it works -- now, a Bloomberg report says Google was able to create it thanks to a secret deal with Mastercard. Mountain View paid millions for a stockpile of Mastercard transactions after four years of negotiations, according to the publication's sources who were directly involved with the deal. Neither the tech giant nor the credit provider told the billions of Mastercard holders that their purchases were used to develop the ad-tracking tool.
