|QR code for the URL http://blog.kasunbg.org|
So, what is it exactly?
You might be wondering is it a way to communicate secret message? or just another bar code to be used in your grocery store. Well, it's not a secret cipher where you have to know the key to decode it. Well then, what's the use of it? Suppose you are this big guy/gal who has a business card for yourself. How much time will customers of yours will keep your card in their pocket when you give it to them; a month? say two months max, then surely they might lose it somewhere or may be end up in laundry! But if you print your QR code in it, they can scan it, and store your info as a 'contact' in their phone. Problem solved! One other occasion is, you can show your web sites URL from that image, and interested people can quickly scan it and go to your site. For instance, the above QR image opens this weblog. QR codes are expected to be a popular technology especially between smartphone users.
How to create them
Here's a video of using QR codes in business cards.