Sentiment analysis essentials bing liu department of computer science university of illinois at chicago liubcsuicedu sentiment analysis mining opinions sentiments and emotions bing liu shenzhen december 6 2014 2 introduction sentiment analysis sa or opinion mining. Sentiment analysis and opinion mining 7 chapter 1 sentiment analysis a fascinating problem sentiment analysis also called opinion mining is the field of study that analyzes peoples opinions sentiments evaluations appraisals attitudes and emotions towards entities such as products services organizations. Sentiment analysis is the computational study of peoples opinions sentiments emotions and attitudes this fascinating problem is increasingly important in business and society it offers numerous research challenges but promises insight useful to anyone interested in opinion analysis and social media analysis. Although we have known sentiment analysis as a task of mining opinions expressed in text and analyzing the entailed sentiments and emotions so far the task is still vaguely defined in the research literature because it involves many overlapping concepts and sub tasks. Sentiment analysis is the computational study of people s opinions sentiments emotions and attitudes this fascinating problem is increasingly important in business and society it offers numerous research challenges but promises insight useful to anyone interested in opinion analysis and social media analysis