Facebook now makes it easy to track page metrics by sending administrators a list of statistics every Monday, including the growth in fans when compared to the previous week and the traffic that has actually come to the page during that week.

Facebook also reports Insights on every post made by an administrator on a page, along with new graphs that display users’ gender and age range.
Post insights include the number of impressions or how many times a user has seen that page’s post on either their Facebook wall or on the page’s wall, and the percentage of interaction with the post.

Audience size, average interaction and post quality are all important factors when evaluating an interaction percentage. Most pages with 1,000 fans or less will consider one percent or more to be a resounding success, whereas a page of a famous name brand or celebrity with thousands of fans (5,000 or more) and an active community might see an average of two to five percent.