What is the purpose of QR codes?

Related questions

1. What can QR code be used for?
2. Is QR code open source?
3. How QR code are generated?
4. Why are QR codes important?
5. How big should QR codes be?
6. How do QR code generators work?

Tags

1. #tagging
2. #information
3. #which
4. #smartphone
5. #owner
6. #works
7. #reader
8. #conjunction
9. #known
10. #mobile
11. #response
12. #quick
13. #barcode
14. #process
15. #camera
16. #points
17. #access
18. #opens
19. #provide
20. #through
21. #phone