Ключевые слова: alternative, attitude, bad, business, change, choice, choose, client, concept, customer, emotion, evaluation, face, feedback, good, happiness, happy, icon, idea, marketing, mood, negative, opinion, optimism, optimistic, pessimism, positive, positivity, quality, question, questionnaire, rating, result, review, sad, satisfaction, service, sign, smile, strategy, success, successful, survey, symbol, thinking, unhappy, user,