Certainly you’ve seen them on email signatures, stickers, business cards even billboards.  They almost look like a bar code, and in many ways functions like one. QR Codes are the latest trend in Social Media, and of course they’re free.  The main difference between a barcode and a QR Code is the amount of information they hold.  QR Codes can be easily downloaded and customized.  These tiny squares make relevant information easily accessible.  Basically you download an App that allows you to scan the code with your iPhone or Android mobile phone.  Hold your phone or iPad over the QR Code, snap a picture and instantly the information embedded in the QR Code is downloaded into your device. read on...