What are QRCodes?
QR codes are two-dimensional barcodes that can be read by many cell phones and smartphones. The codes, which are small squares with black and white patterns, appear in a variety of places, such as magazine and newspaper ads. A QR code is used to encode some sort of information, such as text or a URL.

The "QR" in QR codes stands for "quick response," as the codes are designed to be read quickly. QR codes can be read by dedicated QR code readers and by some cell phones. To read a QR code, your cell phone will need a camera -- so it can snap a picture of the code -- and a QR code reader. You can find many free QR code readers in the various app stores for different phone platforms.

Once your cell phone reads the code, the information that it stores is shared with you. QRCodes can contain a variety of different types of data, including:


QRcode readers are free to download: I have listed 3 sites, however if you just search QRCode reader, you will find may good readers

i-nigma

beetagg

Android Apps


QRCodes explained - take a look at this video to see QRCodes in action.