"Just open a phone camera, point it at this special type of link and get transported to a website with more information than a paper menu ever offered. Even classically brick-and-mortar businesses like furniture retailers are using QR, or quick response, codes to help shoppers choose what to buy.But QR codes serve a purpose beyond cutting down on germs. They turn analog interactions — like ordering a pizza — into digital ones, and those digital interactions can be subject to tracking by the restaurant or store. Because QR codes open a browser, companies might use that digital signal to connect the dots between online and offline activity."
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