This talk was given at a local TEDx event, produced independently of the TED Conferences. Why are companies so intent on using technology to track our behavior? Our actions reveal what we desire, how we shop, and why we buy. Retailers can now learn so much more about shopper behavior than ever before, and while these “big data” applications create concerns about privacy, the detailed data can be used to design stores, product offerings and promotions that connect with our interests, speed up the shopping process, and help us find items we will buy. These new tools are critical to improving store efficiency and shoppability; and offer a vision of the future of retailing.