The days of posting something on your Facebook Fan Page wall and having all of your fans see it are gone. As Facebook continues to grow and improve the way that users are served content, EdgeRank is something that all marketers and businesses should be aware of.
Playing a central role in the Facebook user experience, EdgeRank determines what items and stories are to be populated on an individual users News Feed. Specifically, each story is assigned a value which takes into account three known factors: Affinity, Weight, and Time
Affinity: the relationship between the user and the updates origin page and or/friend whose update it is. Continue reading Infographic: Facebook EdgeRank and Why You Should Know About It