What is the most important tags in the html5

Answer 1

<h1> - <h6> Heading
<p> Paragraph
<i> Italic
<b> Bold
<a> Anchor
<ul> & <li> Unordered List & List Item
<blockquote> Blockquote
<hr> Horizontal Rule
<img> Image
<div> Division
http://www.inwebson.com/html5/10-useful-html5-tags-and-attributes/

Answer 2

There is no most important tags.Its better you just put it as html structure,cos even without writing the html structure some platforms like sololearn will auto add it for you