For any community especially those in open source, newcomer onboarding is important but retaining them is critical. Since past two years, we at the Fedora Community Operations team have been working on understanding community health and on improving contributor retention rates in our community. Using this poster session, I would like to share some of the findings from our work, similar research done by other open source projects and how we can use and apply these findings. The poster will discuss some community-oriented metrics we use at Fedora to understand community health like contributor engagement metrics, contributor onboarding and retention rates etc. I will then share some insights derived from finding common patterns in contribution activity of long-term active volunteers i.e. Are they involved in many different areas of their projects? What are some good measures to predict how long a volunteer will stay ? What is the magic element X that makes people stay ? The poster will also discuss about similar research done by other open source communities in this area and how these insights can be applied to improve contributor retention rates and overall community health on an individual as well as community level.