Ключевые слова: advice, answer, ask, attention, background, business, client, comment, communicate, communication, complaint, concept, consumer, contact, evaluate, evaluation, feedback, idea, important, information, marketing, matter, message, motivation, opinion, promotion, quality, reaction, report, research, respond, response, review, satisfaction, service, share, sign, speech, suggestion, support, survey, symbol, tags, testimonial, text, thought, valuable, value, word,