Ключевые слова: angry, bad, business, button, choice, client, concept, customer, digital, emoticon, emotion, evaluation, excellent, expression, face, feedback, five, good, green, happy, icon, like, man, marketing, mood, negative, online, opinion, person, positive, quality, rate, red, review, sad, satisfaction, service, set, sign, smile, smiley, smiling, survey, symbol, technology, user, woman,