A header or footer can contain text, information about the document, or even images. You can create one header or footer for the whole document, or have a different header or footer for the first page, odd. and even pages, or even multiple sections.
Note: The best way to work with headers and footers is in Word on a laptop or desktop computer, rather than in a web browser or mobile app.
![Header style selection dialog with one selected](https://support.content.office.net/en-us/media/2de75012-8619-42fe-afb5-400ad705b2db.png)