How to avoid QR code lost problem?
Do you face this problem?

A QR code itself doesn't have an expiration date. Once a QR code is generated, it remains the same unless deliberately changed or deleted by the entity that created it. However, the most QRcode display error url, and it is controled by the another entity becasue the url link is not directly tranfer to company website, and it is just display to the entity url, so your QR code is controled by another entity, so your QR code is always unusefulness for your advertisement
Please use fllow method to check you QR code

When you scan you QR code it will display your website rul, this QR code is directly transfer to your application. You can ensure that your QR code is correct. Please try to scan InstergramQR code, you can discovery the truth.