<p>Semantic HTML is the use of HTML markup to reinforce the semantics, or meaning, of the information in webpages rather than merely to define its presentation or look.</p>
<p>Here are some examples of the new semantic elements in HTML5:</p>
<ul>
<li>address</li>
<li>article</li>
<li>audio</li>
<li>aside</li>
<li>code</li>
<li>cite</li>
<li>dd</li>
<li>dl</li>
<li>dd</li>
<li>em</li>
<li>figcaption</li>
<li>figure</li>
<li>footer</li>
<li>header</li>
<li>hgroup</li>
<li>mark</li>
<li>nav</li>
<li>samp</li>
<li>section</li>
<li>time</li>
<li>video</li>
</ul>
<dl>
<dt>address</dt>
<dd>Used to specify address of <code>article</code> tag</dd>
<dt>article</dt>
<dd>Independent, self-contained content.<br/>Internal structure: h1, p, p.</dd>
<dt>aside</dt>
<dd>For side-bars or inserts into original content. Related to the surrounding content.</dd>
<dt>audio</dt>
<dd></dd>
<dt>code</dt>
<dd>Piece of computer code</dd>
<dt>cite</dt>
<dd>Defines the title of a work (Not author name!). E.g.: *The Scream* by Edward Munch</dd>
<dt>dd</dt>
<dd>Description Description in Description List</dd>
<dt>dl</dt>
<dd>Description List</dd>
<dt>dt</dt>
<dd>Description Title in Description List</dd>
<dt>em</dt>
<dd></dd>
<dt>figcaption</dt>
<dd>First or last child of <code>figure</code> tag</dd>
<dt>figure</dt>
<dd>Container for image and it's caption</dd>
<dt>footer</dt>
<dd></dd>
<dt>header</dt>
<dd>Introductory content or set of navigation links</dd>
<dt>hgroup</dt>
<dd>Group of headers h1,h2... Not included in HTML5</dd>
<dt>mark</dt>
<dd>Used to highlight text (e.g. marker style)</dd>
<dt>nav</dt>
<dd>Defines a set of navigation links (<code>nav -> a</code> OR <code>nav -> ul -> li</code>)</dd>
<dt>samp</dt>
<dd>Sample output of a computer program</dd>
...