Ключевые слова: angry, awareness, background, bad, business, button, care, check, choice, client, concept, conceptual, consumer, customer, emoticon, emotion, evaluate, evaluation, excellent, experience, face, feedback, feeling, good, green, hand, happy, icon, illustration, marketing, mood, opinion, person, positive, quality, rate, rating, red, review, sad, satisfaction, service, sign, smile, smiley, smiling, survey, symbol, user, yellow,