The importantance of traceing one's roots

The importantance of traceing one's roots is needed because it shows your children,grandchildren and greatgrandchildren where their ancestors came from. It's sad that many africanamercians don't know what part of africa their ancestors came from. All they know is that they came from some part of the United States. I plan to trace my root soon and to fine out I plan to take a simple DNA test. All I have to do is to take some cotton and rub the inside of my cheek. Before this it would take months and years to find out what part of Africa my ancestors came from. This would leave a wonderful legacy!