First you would need to get your results back from the DNA testing site. It is important to look at both length of the longest segment and the total cM in common. If the cM numbers are listed with your matches, like on 23andMe, you can plug them in. If you tested at other sites, you may have to do some more looking to find the total cM and longest segment numbers. Check our other resources for more information on your particular testing site. Use this chart to speed up your search for family. Plug in the numbers for each match, then put them in the predicted place in your family tree on Ancestry or MyHeritage or other tree builder that sends you hints and see what hints come to you based on these predictions. There is a lot more work to do if you are adopted and are trying to piece a family tree together from scratch, but this automated tool can help save time for anyone working on DNA Genealogy.