aside element

• Plain
• With <h1>
• With aria-label
• With <h1> referenced by aria-labelledby

Code

<aside>
Lorem ipsum...
</aside>

<aside>
<h1>Once upon a time</h1>
Lorem ipsum...
</aside>

<aside aria-label="Once upon a time">
Lorem ipsum...
</aside>

<aside aria-labelledby="aside-title">
<h1 id="aside-title">Once upon a time</h1>
Lorem ipsum...
</aside>

Reference

HTML5 aside element