Once in a while I see a description of a program that is to be installed via Android market. It is often accompanied by a two-dimensional barcode looking like a QR code that I guess somehow contains a link to the right Market page and the process of using it should be very easy.
I've searched and the closest thing I found is this question about reading QR Codes which makes me think it shouldn't be that hard and so I can't see whether that question is about the same usecase I'm asking about.
How exactly to make use of such barcodes? What's the way to proceed from the QR code on a web page to Market page?