QR codes are a privacy problem — but not for the reasons you’ve heard
QR codes have emerged as an effective way to collect first-party data, Ramos said. If that pair of jeans you like has a QR code on the tag, you can scan to read more details on the brand’s website. The next time you visit, the site will remember you, and the jeans might be waiting in your shopping cart with a discount.
Source: WP
