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<article> Defines an article in the document
<aside> Defines content aside from the page content
<bdi> Defines a part of text that might be formatted in a different direction from other text
<details> Defines additional details that the user can view or hide
<dialog> Defines a dialog box or window
I mostly use few popular HTML5 elements like Nav, header, article, footer etc.,
Navigation helps to know search engines regarding menu in different browsers. These new tags new browsers are understanding. In mobile first concepts also HTML 5 elements are essential.