A QR code (Quick Response code) is a bar code which acts as a trademark label for a particular content. This content can be anything like a page an image or a URL. QR codes are used for tracking and identification for an online content. It is generally used for tracking coupon codes and other types of discounts in a website. Nowadays, QR codes are mainly used for URLs. QR codes are readable by a QR code scanner or you can download an app to read or scan a QR code. You can find these apps for your smart phone or tablet in Apple iTunes Store or on Android Google Play. Here’s a free QR code reader app for iPhone and here’s a free QR code reader app for iPad.
For Example, here is a QR code for our blog URL: http://www.thatsjournal.com
By the help of this WordPress plugin you can add a QR codes generator in your WordPress blog as given above. You can generate fully customizable jQuery QR bar codes for any type of content in your bog like posts, pages, images, links, locations, emails, etc. The QR codes which are generated by this plugin can then be added to the post page by the help of widgets. You ca include the widgets in any sidebar as per you needs.