There are few important criteria of evaluating if the community. The key points to measure with reference to latest Facebook Change are the following:

• Reach
• Engagement

You can check this from the reach and engagement that works along the posting, this shows if the organic growth from real fans (in terms of engagement growth rate), for starters from Mari Smith, we strive for 2% engagement rate.

Also, one of the viewed easily is number of incoming inbox messages when fans arriving can be done. Here's below of number of entries recorded per day.

The preferred Engagement Rate (ER) is around 2% which is good to start. Such engagement can be measured with viral campaigns such as promotion

Engagement of Community Building Activity which helps in Inbox messages. More engaged fans that gives response in inbox will tell you what people are asking and you can use the answer to give to crowd.

A growing demographic that matches the customer niche shows a progress in facebook community building.

The demographic of sample women and men is 75% and 25%, age between 25-34%.