Layout Tags (header, footer, nav, aside)

          The  <header> element represents the whole page's header or a section of it and usually contains a logo, search, navigational links, etc.

          This tag doesn’t present a new section in the outline. A <header> element commonly contains the heading (an <h1>-<h6> element) of a surrounding section. However, this is not required.

          The <header> tag is one of the HTML5 elements. In an HTML document, it is allowed to use several <header> tags, which can be placed in any part of it.

Note: It is not permitted to place the <header> tag inside the <footer> and <address> elements, and in another <header> tag.

          The following shows how a <header> element is used:

    <header>
              <h1> This is a page heading </h1>
    </header>