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Switching mediums doesn't dictate what you can and cannot do. A couple of years ago, print posters that promoted events, products, or services often displayed a web address, which would often result in people following these steps:
It was a frustrating process until Quick Response (QR) codes became popular. Unlike traditional barcodes, which are capable of only displaying data like product prices or descriptions, QR codes are capable of much more like browsing or bookmarking a website. All a user has to do is scan the code, leaving the rest up to the smartphone or tablet. It's just another way to make your relationship with your users more accessible. Following is a list of more advanced usages of QR codes: