Question

what is the use of header and footer option in a word processing document

Answer 1

header - for heading
footer - for footnote ,page no

Answer 2

Header: - Header is displayed on the top of the page at the place of top page margin. In header what you write will display on the top of the page in every page of the document.

Footer: - Footer is displayed in the bottom of the page at the place of bottom page margin. In footer what you write will display on the bottom of the page in every page of the document.

Header and Footers are mainly used in letter pad of any organization.

Its use may have you also seen on medical prescription.