Ключевые слова: 1, advice, analysis, angry, assessment, assistance, bad, business, checkbox, choice, client, comment, consumer, customer, disappointment, dislike, dissatisfied, down, emoticon, emotion, evaluation, experience, expression, feedback, feeling, internet, man, marketing, measurement, negative, online, opinion, performance, poor, product, quality, questionnaire, ranking, rate, review, sad, satisfaction, score, service, signs, survey, trust, unhappy, user, vote,