Ключевые слова: alternative, background, business, check, choice, choose, client, concept, customer, emotion, events, excellence, excellent, experience, face, feedback, finger, good, hand, happy, icon, life, marketing, mood, negative, one, opinion, people, poll, positive, product, quality, question, questionnaire, rank, ranking, rating, research, review, sad, satisfaction, service, smile, survey, symbol, test, three, unhappy, user,