The audience for the link that’s created depends on the privacy settings of the person, Page or group you mention. For example, if you mention a secret group, only that group's members can see the link. read more
When you tag a Facebook fan page -- better known as a Facebook Page -- in a status update, the tagged Facebook Page automatically receives an email notification, depending on the administrator's notification settings. read more
You'll see this option in the bottom-right corner of the status window. Clicking it will post your status with your page tagged. Your tag won't show up on the page's News Feed, but your friends will be able to click the tag to view the page. read more