tl;dr: Folks want to use ancestry to see where and how it goes. What do they need to know? Is there anything to avoid?
I’m not wild on the idea of submitting DNA swabs for a lot of reasons, the recent issues with genealogy.com’s data being a great example. What of tracing family tree by liniage?
Know that you could be contacted by someone with DNA info showing your father conceived a child that you never knew about. Yep. It happens.