This is considered mandatory for all official documents. You can use just simple text or you can add page number to header or even time and date, picture or clip art to footer. Create header and footer to clearly mark your document pages.
Create word document an then select Insert on main tab. Select Header and choose one of the available options (Slide 1.). For some more options, header templates visit Office.com .Slide 1
Type document header or whatever you find appropriate for your document. Further more you can manage page number or header distance from top. When you are done double click on document in order to impress header to document (Slide 2.).
Next step is to create footer. Again go to Insert on main tab and select Footer. Choose between available options for footer appearance (Slide 3.). Again type whatever you find appropriate and as in case of header manage additional option such as distance from bottom, images or clip arts.
As in case of header double click on document in order to impress footer to document (Slide 4.). Easy as that.
I hope that this tutorial was informative to you and thank you for visiting this website.