I’d heard about QR codes in the past – otherwise known as quick reference codes – but only recently have I realised how useful they are. Basically, they’re the next step forward from bar codes.

A square image holds many pixels, which a programmed reader can recognise and decode. A simple idea – but very handy.

You may have started noticing them in advertisements and on posters. The idea is that you scan it with your smartphone or other reader, and your device will instantly decode it and provide you with whatever information you requested.

Any one QR code can hold a whole host of information such as URLs, contact cards, texts, wi-fi network details, geo-locations – the list goes on!

I’ve now trimmed up the twitter feed with a QR code for this site – seems like a no-brainer to me. There are loads of online QR code generators – such as this one – so why not stick one on your site?