Ключевые слова: advertising, assessment, block, change, choose, client, compliment, concept, critic, customer, customers, depression, emotion, emotions, excellent, expression, feedback, friendly, funny, good, happiness, happy, mood, negative, opinion, people, positive, quality, rating, reputation, rest, review, sad, satisfaction, satisfied, select, service, smile, success, survey, symbol, unhappy, user, vote, wood, wooden,