Purpose:
Represents complementary content, often a sidebar.

Use Cases:

  • Related links, ads, or author bios.
  • Supplementary info that isn’t part of the main content.

Accessibility:

  • Announced as a “complementary landmark”.
  • Helps users distinguish between primary content and related content.
<aside>  
  <h3>Related Articles</h3>  
  <ul>  
    <li><a href="/tips">Travel Tips</a></li>  
    <li><a href="/gear">Packing Guide</a></li>  
  </ul>  
</aside>