The <header> Element
In HTML4, we would define a header like this:
In HTML5, a simple <header> tag is used, instead.
The <header> element is appropriate for use inside the body tag.
<h1> Most important heading </h1>
<h3> Less important heading </h3>
The <footer> Element
The footer element is also widely used. Generally we refer to a section located at the very bottom of the web page as the footer.
The <nav> Element
This tag represents a section of a page that links to other pages or to certain sections within the page. This would be a section with navigation links.
Here is an example of a major block of navigation links:
<li><a href="#">About us</a></li>