A QR code is a set of pixels that can be read by an app, usually used to direct users to a webpage. It is an abbreviation of Quick Response Code.
It is intended to be an easy way to get users to your website, as a QR code could be placed on a poster (for example), which users would then only need to take a picture of on their smartphones to access the site.
It should be noted that QR codes should never be used on websites as they actually make it harder to travel from one page to another than using traditional links.
Glossary Index