A header is placed at the top of the document and is displayed at the top of every page of the said document. When, a heading is meant to display the heading of one part of the document.
The section tag is meant to define a section of a particular document and the information inside the section tag is grouped. The div tag defines a section in a document.
Articles are elements that specify a section of some sort of independent content that is reusable. For example, web log entries are created using article tags.
The section tag is meant to define a section of a particular document that contains grouped information.
A header is placed at the top of the document and is displayed at the top of every page of the said document. It also can contain all the other headings used later in the document.
Footers tags usually come after sections and give us additional information about the said section.
The Navigation element represents a section that provides us with links to other pages or parts of the same document.
The aside element contains things that are related to a specific section in the document or the whole document but could be considered as separate from the whole document.