[SOLVED] What’s this image called ?

and how can we read it ? I once knew that but I forgot
Answer #1
That’s a QR-code.
You can decode it here.
http://zxing.org/w/decode.jspx
Answer #2
That’s it, thanks : )
Answer #3
what is that code used for anyway?
Answer #4
Something with mobile phones taking a picture of that image which brings them directly to the concerning webpage…
I didn’t read the whole mambo-jambo about it, but that’s the main idea