To choose correct community health metrics we need to understand what health or success means for the community. I think we can say the following.
A healthy community is a community that has more people joining it than people leaving it.
The suggested metrics are:
- The ratio of the number of users who started participating on the site to users who stopped participating on the site.
- The number of monthly engaged users
This is a fragment of a draft of the book “Lessons Learned While Working On Stack Overflow”. Read the full book on kindle or the paperback version.