1. HTML5 Tutorial
2. HTML5 DOCTYPE
3. HTML5 Language
4. HTML5 Character Encoding
5. HTML5 Form Fields
6. HTML5 Local Storage
7. HTML5 Geo Location
8. HTML5 Messaging
9. HTML5 Drag and Drop
10. HTML5 Web Workers
11. HTML5 Semantic Elements
12. HTML5 header Element
13. HTML5 hgroup Element
14. HTML5 Footer
15. HTML5 nav Element
16. HTML5 article element
17. HTML5 time Element
18. HTML5 File API
19. HTML5 History API

The HTML5 hgroup element is used to semantically group a headline and subheadline into the same header group.

Look at this example title:

<h1>Wealth</h1>
<h2>How the rich get richer, and how you can get richer too.</h2>

The h1 and h2 headline is actually part of the same title, but a browser or web crawler cannot see that. To signal that you enclose the two elements in a hgroup element, like this:

<hgroup>
<h1>Wealth</h1>
<h2>How the rich get richer, and how you can get richer too.</h2>
</hgroup>

Now the h1 and h2 elements are grouped into a single semantic headline. A web crawler will now understand that these two elements are part of the same headline.