Welcome to Learning HTML
The details element creates a section of the document that the user can expand to get further details about a topic. The details element usually contains a summary element, which creates a label or title for the details section.
The address element is used to denote contact information for a document or article element. Check out all properties about it.
The aside element denotes content that is only tangentially related to the surrounding element. This is similar to a sidebar in a book or magazine.
The article element represents a self-contained piece of content in an HTML document that could, in principle, be distributed or used independently from the rest of the page.
The nav element denotes a section of the document that contains links to other pages or to other parts of the same page. Obviously, not all hyperlinks have to be in a nav element.