Which of the following is a feature of QR codes?

QR codes are designed to store and encode information in a manner that can be easily read by devices, particularly smartphones equipped with cameras. One of their primary features is the ability to link directly to websites. This is accomplished by embedding a URL within the QR code, which, when scanned, redirects the user to the corresponding web page. This functionality allows for efficient access to digital content, making QR codes particularly useful in marketing, advertising, and providing quick access to information.

Other options do not accurately represent the functionality of QR codes. For instance, while QR codes can be used in physical stores, they are not limited to that environment and can be utilized in various contexts, such as digital advertising or product packaging. Additionally, QR codes are specifically designed to be scanned with smartphones and other devices; thus, the notion that they cannot be scanned with smartphones is incorrect. Lastly, while there is some overlap in use, QR codes are distinct from traditional barcodes and serve more advanced functionalities regarding data encoding and retrieval.