QR codes are designed to make accessing more information about a particular product or advertisement easier by sending the consumer directly to the source of the information.  For example, an advertisement about in-state tuition could have a QR code on the print ad or television screen where people could scan the code with their phones.  After scanning the code, their phone would be directed to the web page  about PSU's enrollment information.

QR codes can be generated at a variety of different websites.  By entering the internet address into the QR code generate for the page you want consumers to see starts the process.  The QR code generator then produces a QR code that will send people to your desired page after they scan the code.

QR codes track how many people use the code from where you generate them.  They code can record how many people scan the code and then how many people travel around the page and where they go after their introduction to the page.

Using a QR code has become an important part of today's advertising industry.  By using a QR code you enable consumers to gain more information about a product within seconds of their initial interest.  Consumers are able to go directly to the information the producer wants them to see rather than the consumer having to search for more information on their own.

Source:
http://kimtag.com/s/create_a_qr_code?gclid=CJukqPqb260CFYMEQAod-Cuaow