Summary: To be effective, QR codes need clear, brief, contextual information and must lead the user to relevant pages. QR codes provide a seamless transition from the physical world to digital spaces or across digital channels. QR codes have a lower interaction cost than typing in a URL, but convenience does not guarantee that users will take action just because a QR code is presented to them. Use
![13 QR-Code Usability Guidelines](https://cdn-ak-scissors.b.st-hatena.com/image/square/7ebd75ff7228a52c3a40e1b9905610c6626ec4b9/height=288;version=1;width=512/https%3A%2F%2Fmedia.nngroup.com%2Fmedia%2Farticles%2Fopengraph_images%2FQR-codes_openg-39.jpg)