The semantic differential is mainly used in questionnaires and surveys to obtain an emotional response or attitude from people to a specific topic and to allow customers to evaluate products, services, brands, or organizations.
Typically a semantic differential is a grading scale that begins and ends with rating options that are semantically opposite (usually polar adjectives such as "like-not-like," "satisfied-dissatisfied," and "would not recommend") and may include varying degrees of these options in between.