At the very core, communication skill simply concerns the proficiency or quality of one's communicative performance. Just as people's dancing, driving, or chess playing reflects as certain level of proficiency, so too do their various communication activities, such as listening, public speaking, and making small talk. Communication skill is one of the most extensively and intensively studied of all aspects of human behavior, in part because it is fascinating in its own right, but also because communication skill is vitally important to one's well-being: Skillful communicators are happier and healthier, enjoy more satisfying interpersonal relationships, and perform better in school and in their jobs.