After the helpful comments above, it's clear that this is an extra GUI addon from the SDL store (which is free) that would need to be implemented by the web administrator.
Edit,
adding the link : )
https://appstore.sdl.com/web-content-management/app/2013-view-in-staging-and-live-ui-extension/626/
as others have said, this isn't needed in 8.0!