An essential step in genealogical research is checking to see if anyone has already researched your family tree. If you find that someone has already worked on a branch of your family tree, it can provide important information that will be helpful as you continue your research. It doesn't mean that the job is over. It's essential to verify work done by others. It's also possible that more information has become available since the work was initially done. If you do find that someone has already climbed a particular branch on your family tree, though, it can give you a great start.