Sentiment analysis — задача обработки естественного языка (NLP), которая identifies and classifies opinions, attitudes or emotions expressed in text or speech. Она часто используется для измерения того, является ли language about a product, service, organization or topic positive, negative, neutral или associated with specific feelings.
Using statistical or machine learning algorithms to determine a group's overall attitude---positive or negative---toward a service, product, organization, or topic. For example, using natural language understanding, an algorithm could perform sentiment analysis on the textual feedback from a university course to determine the degree to which students generally liked or disliked the course. See the Text classification guide for more information.