"Nonjudgmental" is an adjective referring to a person's ability to not let personal standards and preferences impact interpretations of the actions of others. Company leaders, parents and counselors who are nonjudgmental are able to listen to others describe thoughts or behaviors without thinking negatively about them.
A primary advantage of being nonjudgmental is that a person is less likely to discriminate. A business owner who treats all customers fairly is more likely to generate positive goodwill in a community. To avoid passing judgment, it is important to listen with an open mind, and to listen with the intent to understand, not reflect.