You might see <h3> Element reference while reading someone else’s HTML, or need it while building a page of your own. Instead of memorizing a definition, look at a working example and see when the element makes sense.
The Idea in Plain English
A third-level heading for a subsection of an h2 section.
For a reference page, pay attention to where the element is allowed, whether it needs a closing tag, and what other elements it can contain.
A Working Example
Read the sample once before copying it. Notice the element names and attribute values, then compare them with the explanation below.
<h1>My Garden</h1>
<h2>Plant Care</h2>
<h3>Watering New Seeds</h3>
<p>Keep the soil lightly moist.</p>What Each Part Does
- The h3 names a subsection under a larger topic.
- The h1 identifies the principal page heading.
- The h2 identifies a major subsection.
The nested topic is presented as a subsection of Plant Care.
Try It Yourself
Try replacing the example content with your own while keeping the valid HTML structure.
Common Beginner Mistakes
- Jumping heading levels without a logical content reason.
- Changing several parts of the example at once, making it difficult to see which part caused a different result.
- Choosing a tag only because its default appearance looks right, without checking whether it describes the content correctly.
Key Takeaways
- A third-level heading for a subsection of an h2 section.
- The nested topic is presented as a subsection of Plant Care.
- Test the markup in a browser, and check accessibility and real-world behavior where relevant.