A header is the top margin of each page, and a footer is the bottom margin of each page. Headers and footers are useful for including material that you want to appear on every page of a document such as your name, the title of the document, or page numbers.
A document footer is a small section at the bottom of each page within a document. It is often used to display company data or copyright information. In longer documents, the footer may be used to specify the current section of the document as well.
