Harassment refers to unwelcome conduct based on protected characteristics or other grounds that creates a hostile or unsafe work environment. Bullying is repeated, abusive behavior aimed at undermining a coworker, often involving power imbalances. Discrimination is unequal treatment of someone because of a protected characteristic (e.g., race, sex, religion). This module defines each term, provides examples, and explains why they are harmful and have legal and ethical implications for organizations and individuals.