Ключевые слова: assessment, best, blue, business, businessman, care, choice, choose, client, concept, conceptual, customer, day, emoticon, emotion, employee, evaluation, excellent, experience, face, feedback, feeling, giving, good, hand, happy, health, marketing, mental, mental health, mood, opinion, person, poll, positive, psychology, quality, questionnaire, rating, relationship, result, review, satisfaction, service, smile, survey, test, user, wellbeing, wellness,