How do QR code payments work?

Related questions

1. What is the difference between static and dynamic QR codes?
2. What do you scan QR codes with?
3. When would you use a QR code?
4. What is a dynamic QR code generator?
5. Can QR codes be changed?
6. Do free QR codes expire?
7. How do I create a dynamic QR code?

Tags

1. #money
2. #camera
3. #scanning
4. #process
5. #payments
6. #generated
7. #allow
8. #smartphone
9. #codes
10. #merchants
11. #quick
12. #mobile
13. #dimensional
14. #receive
15. #phone
16. #simply
17. #merchant
18. #traditionally
19. #response
20. #number
21. #customers
22. #using
23. #sending
24. #involves