Genealogy (from Greek: γενεά genea, "generation"; and λόγος logos, "knowledge"), also known as family history, is the study of families and the tracing of their lineages and history. Genealogists use oral interviews, historical records, genetic analysis, and other records to obtain information about a family and to demonstrate kinship and pedigrees of its members. The results are often displayed in charts or written as narratives.
The pursuit of family history and origins tends to be shaped by several motivations, including the desire to carve out a place for one's family in the larger historical picture, a sense of responsibility to preserve the past for future generations, and a sense of self-satisfaction in accurate storytelling
Genealogy is the study of your unique family history. It is a personal record of your ancestors -- when they were born and where they lived, who their children were and who they married, and where you belong in your extended family tree.
Learning about your family history usually starts at home by talking with relatives and friends, and recording information about your ancestors.
You may have useful sources at home such as birth certificates, obituaries, wedding announcements, a family Bible, etc.
You may find that others in your family have already done genealogy work, so don't hesitate to ask close or distant relatives if they have already started researching your family.