Ключевые слова: bad, business, choice, client, concept, consumer, copy space, customer, disappointment, dislike, dissatisfied, down, emoticon, emotion, evaluation, experience, expression, feedback, feeling, give, hand, life events, marketing, negative, not good, one, online, opinion, person, poor, positive, product, quality, ranking, rate, rating, reputation, result, review, sad, satisfaction, score, service, sign, survey, symbol, thumb, unhappy, user, vote,