All standard growth metrics are tracked and graded week-over-week, like: new discussions, comments, users, page views, visits, searches, etc.
Measure how many questions and concerns are resolved by users vs those resolved by your support staff.
Understand how long it takes before new discussions receive new comments, how sticky your community is, and take action to improve.
Go beyond basic statistics to understand how you can affect the growth of your community through system-based incentives & gamification.