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QR Codes are a little bit of a fad if you ask me... but can be most effective to help drive customers to a specific deal or contest. For brick and mortar businesses, they can also be effective for guiding customers to "check-in" at your place of business on FB or Foursquare.
QR Codes, otherwise known as “quick response codes” are part of a whole new way of connecting with consumers via their smart phones and mobile devices. The following infographic provides a brief history of how bar codes and QR codes came into existence as well as some statistics on how they are being used today.