If you are working in a big corporation and saying something bad against it or its policies using an anonymous social media account to blog, with doxxing you will be out in front of the world. You may lose your job and even your career in some instances. We need to be alert and say things that are not offensive or degrading online to escape these circumstances.
Doxxing can help a person embarrass or humiliate you in front of the world, may lead to identity theft, cyber-attacks, harassment, etc.