Sentiment analysis, opinion extraction, tone analysis, or opinion mining is a technological tool used to understand and monitor customers' general attitudes and emotions towards entities, such as products, services, and brands. This is an Artificial Neural Network (ANN), based on the automatic processing of human language (Natural Language Processing(NLP)) technique for conducting a qualitative analysis of online reviews. It allows you to analyze user-generated data collected from sources such as forums, press articles, instant messaging platforms, and social networks.