Definition
The <aside> element is used to mark up content that is tangentially related to the main content of the page. It can be used for a variety of purposes, such as including additional information, presenting a list of related links, or providing commentary on the main content.
You may see aside elements used in blog posts, for example, to include a list of related links or a list of recent posts.
<aside>
<h2>Related Links</h2>
<ul>
<li><a href="https://example.com">Example 1</a></li>
<li><a href="https://example.com">Example 2</a></li>
<li><a href="https://example.com">Example 3</a></li>
</ul>
</aside>