From the SMGF website:

Molecular Genealogy (also called "Genetic Genealogy") is the application of DNA to traditional genealogical research.

We have all come up against barriers or "brick walls" in our genealogical research, where incomplete information prevents us from tracing our ancestry or making connections with other families.

Molecular Genealogy can help break through those barriers by complementing records-based research with rapid advances in DNA technology.

By simple DNA testing methods and the comparison of results, we can determine if individuals may be genetic cousins and share a common ancestor.