Besides store visits, what's another input needed to measure store sales?

The correct option is surveys because, alongside automated store visit metrics, Google utilizes consumer surveys to help validate and calibrate the link between online ad engagement and offline purchasing behavior. While store visits track the physical entry into a storefront using location signals, surveys provide qualitative and quantitative data directly from users to confirm whether a transaction actually occurred during that visit. This combination of modeled behavioral data and direct consumer feedback allows Google to more accurately estimate the "store sales" metric for businesses that do not upload their own first-party transaction data, providing a clearer picture of how digital ads drive real-world revenue. Would you like me to explain the difference between using these survey-based estimates and uploading your own hashed point-of-sale data for Store Sales direct measurement?