Why do you need a QR code

QR code - Quick Response code
It looks like:

Read the article more to know
- How to generate it?
- Where can you use it?
- How to read it?
- How can it benefit search marketing?
http://searchengineland.com/what-is-a-q ... -one-27588
It looks like:

Read the article more to know
- How to generate it?
- Where can you use it?
- How to read it?
- How can it benefit search marketing?
http://searchengineland.com/what-is-a-q ... -one-27588