Learn how and when ethnicity estimates can be useful. Several case studies where ethnicity estimates helped solve the genealogy mystery will be covered. This talk covers: 1. How ethnicity estimates are generated and the ancestral timeframe they reflect 2. Differences between the DNA testing companies 3. Additional tools to further explore ethnicity estimates 4. How to identify situations in which they can be very helpful 5. Several examples where ethnicity estimates helped solve a genealogy mystery will be covered.