You can display content from one page or post on another by mirror content. This also works between sites in a multisite configuration.
This WordPress plugin makes it possible to show content from one page on another – it mirrors content. It’s a very easy to use, but yet a powerful plugin.
It takes content from pages, posts and custom post types and shows it on other pages, posts or custom post types. It also works between sites in a Multi-site configuration. For instance, if you have a web site with one site for each language, you only reuse the same information on all sites.