HEADER
The <header> element represents a container for introductory content or a set of navigational links. A <header> element typically contains: one or more heading elements (<h1> - <h6>) logo or icon.
BODY
The <body> tag defines the document's body. The <body> element contains all the contents of an HTML document, such as text, hyperlinks, images, tables, lists, etc.BODY
SIDEBAR
In computing, a sidebar is a user interface element that displays a list of choices. It typically appears as a column to the left of the main content, though it can appear on the right side as well.
FOOTER
The <footer> tag defines a footer for a document or section. A <footer> element should contain information about its containing element. A <footer> element typically contains: ... related documents.
