These three aspects of building a website often take a back seat. But then, try thinking of Google as blind. They suddenly become fundamental toSEO / AEO. Semantic HTML5 is a simple way to structure and give semantic meaning to chunks of content. Easily add semantic meaning to individual words, define hierarchy within content, explicitly communicate the role a paragraph plays in the context of the webpage... How helpful is that?Information Architecture simply means findability and usability. Make your offers / information / answers findable, and once found, easily digestable on all devices, for all users. Including (blind) Googlebot.