Opinion Mining, also known as sentiment analysis, is a technique used to determine the emotional tone behind a series of words. It helps businesses and researchers understand how people feel about a product, service, or topic by analyzing text data from sources like social media, reviews, and surveys. By identifying positive, negative, or neutral sentiments, companies can make informed decisions to improve their offerings. This process often involves using algorithms and natural language processing to evaluate the language used in the text. For example, Twitter posts or Amazon reviews can be analyzed to gauge public opinion, allowing organizations to respond effectively to customer feedback and enhance their reputation.