Brick wall is the term used for an ancestor for whom you can find no information that allows you to go back another generation above him/her.
Do you need help getting more documentation on a brick wall ancestor?
We're happy to help you with your research to help you break that wall and take your research back another generation. As genealogists, one of the most exciting achievements is to "find" another generation - no matter what country they were in.
If you are frustrated with trying to figure out your DNA results, finding adoptive family, brick walls in your family tree, or building a tree, ask for help.