Counselors are professionals who provide guidance and advice to individuals or groups. They can be advisers, MENTORS, or advisors. An adviser is someone who provides advice and guidance on a particular subject or issue. A mentor is someone who provides guidance and support to another person, usually in a professional or educational setting. An advisor is someone who provides advice and guidance on a particular subject or issue, often in a professional or educational setting. All three roles involve providing guidance and support to individuals or groups.