answer:I forget the name of them (someone will come along and tell us soon enough), but those are optical scan codes that can be read by smart phones to impart information via the coded pattern. In essence, they are the newest generation of bar codes. If you know the way that bar code scanners can read the bar codes imprinted on products, then you understand the basics of how this works. However, these “bar codes” interact with the web, which normal (old-fashioned) bar codes do not.