HTML5 header Element

The header element specifies a header for a document or section.
The header element should be used as a container for introductory content.
You can have several header elements in one document.
The following example defines a header for an article:

What Does WWF Do?

WWF's mission:

WWF's mission is to stop the degradation of our planet's natural environment, and build a future in which humans live in harmony with nature.