I agree with IsaacSchlueter's comments, some of the examples/explanations given are just incorrect.
<address> is supposed to be used only to signify the address of the author of the current page, not any address. The <cite> example doesn't really make any sense, as he doesn't actually have any quotation to cite. And Twitter is an acronym for "Founded in 2006"? What?
<address> is supposed to be used only to signify the address of the author of the current page, not any address. The <cite> example doesn't really make any sense, as he doesn't actually have any quotation to cite. And Twitter is an acronym for "Founded in 2006"? What?