The 'header' tag specifies a header for a document or section. The 'header' element should be used as a container for introductory content or set of navigational links. You can have several 'header' elements in one document.
Your main content goes here. The 'article' tag can have a 'header' and a 'footer' tags inside it.
The new html5 tag where you should put your copyright/author information about its containing element ("body", "article").