Ключевые слова: advertisement, analysis, assumption, behavior, business, challenge, communication, compliment, concept, conference, cooperation, distribution, diversity, experiment, feedback, forum, loyalty, marketing, measuring, meeting, participant, population research, positive, presentation, product, promotion, protest, quality, ranking, rating, reputation, research, review, sampling, sampling research, satisfaction, seminar, service, social, society photo, strategy, survey, technology,