On Facebook, the Cover Photo is a large banner image at the top of a Company Page. It is the first content users see on visiting the page and also appears in the News Feeds of Friends of a person who Likes the company page.
Why is a Cover Photo Important?
The Cover Photo is incredibly valuable real estate for Facebook marketers. It is an opportunity to showcase unique product, entertain users and more, depending on the image. Cover Photos will display at 851 x 315 pixels. See Facebook's Cover Photo Guidelines to ensure you do not include messaging that is not allowed.