Question

What are header and footer??

Answer 1

The header is a section of the document that appears in the top margin, while the footer is a section of the document that appears in the bottom margin. Headers and footersgenerally contain information such as the page number, date, and document name.
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Answer 2

Headers and footers are pieces of text, or graphics, that appear at the top and bottom of a page. After you set up a header and footer, they will appear on all of your pages. You can add a page number to a header or footer, and Microsoft Word will automatically insert the right page number. 

it contain information such as date, time etc

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