Facebook Story Types From People Talking About This Page

The number of stories about your page by story type. These stories include liking your page, posting to your page's wall, liking, commenting on or sharing one of your page posts, answering a question you posted, RSVPing to one of your events, mentioning your page, phototagging your page or checking in at your place. Name: [...]

Facebook Fan Page Viral Reach By Story Type

  The number of people who saw a story about your Page by story type. These stories include liking your Page, posting to your Page's Wall, liking, commenting on or sharing one of your Page posts, answering a Question you posted, RSVPing to one of your events, mentioning your Page, phototagging your Page or checking [...]