Android 5.0.1 question :How to open websites using printed black patterned squares?

[AC Question]

There is a printed black-patterned square on the packaging of another product I bought. I think I am supposed to be able to "read" or open a website with it using my Android cellphone. . What is it called and how do I do this?

 

[hallux]

That sounds like a QR code

Grab Barcode Scanner and it will read those and regular barcodes.