A link leaves your system the moment it's printed. The QR code on a restaurant's counter card, the URL at the bottom of a club's poster, the link a shop put on its packaging three seasons ago — none of these can be recalled. You can't redirect ink.
Source: [Dev.to](https://dev.to/goodbarber/the-url-on-the-flyer-doesnt-know-your-app-changed-9kn)