In order to read a QR code you will need to have two things a smartphone with a camera and a QR Reader App, there are several free apps available. Once you have these all you will need to do is hold your phone’s camera over the QR code and the phone will decode the barcode.
Most of the QR codes I have seen tend to take you to a website. Over time I have seen some great ideas for using these codes, here are some of them:
To increase membership
Invite people to sign up for your email list or membership on the spot even when they’re away from their computer.
To direct visitors to mobile resources
You can easily direct users to a mobile tool or mobile-friendly website using a QR code in an email or on a blog. It’s also often the easiest way to direct visitors to a specific app for their phone.
For check ins
Directing visitors to social media sites such as Foursquare and Facebook to check in to events helps friends and contacts keep track of who’s arrived
Adding a mini QR code to your design can direct people to more information about you and your work.
If you offer downloads such as PDFs and whitepapers on your website, include a QR code on them – particularly if people outside your company are likely to use them as resources or hand-outs.
It’s easy to create a QR Code as there are a lot of websites out there that will help you do it. The main site that I tend to use myself is www.i-nigma.com