Have you taken a DNA test? If yes, you should add information about the DNA test you took to your WikiTree profile. From the 'add' drop-down list at the top right of your profile select 'DNA test information'. Within 24 hours WikiTree will display your DNA test information on your relatives' profiles, alerting them to the fact that they should check with their test providers to see if their DNA matches yours. You do not actually upload any DNA to WikiTree, so WikiTree has no way to know if your DNA actually matches anyone else.