Because many people get these cards or leaflets with QR codes, a large part of them are thrown away as soon as they get them. In fact, only a few people can really read the contents of the card carefully. As for those who can scan the QR code on cards or flyers, there are even fewer. In this case, the effective promotion rate is really low. In fact, there is a problem of effective user ratio whether it is network promotion or ground promotion. It is impossible for all users to be interested in the promoted information. Really effective users are definitely only a small part of all users, and it is impossible to require all users to become effective users. This is true for network promotion and push promotion. In network promotion, users who are really interested in the information content and have consultation often only account for a small part of the total number of users who have seen the information, so it is normal for many people to throw away cards or leaflets as soon as they get them, because most users are not interested in the promotion content.

Conversely, if the product or service is really good and can really meet the needs of some users, then there will always be some users interested in promoting information. In other words, even if many people throw away the QR code cards or leaflets directly, there will still be a small number of users interested in the contents of the cards or leaflets, which can play a more or less promotional role.