This paper addresses the challenge of mining and summarizing customer reviews for products sold online. The authors propose a method that focuses on identifying product features and the sentiment associated with them, rather than summarizing the text of individual reviews. The process involves three main steps: (1) mining product features from customer reviews, (2) identifying and classifying opinion sentences, and (3) generating a structured summary of the results. The system, called FBS (Feature-Based Summarization), uses techniques from data mining and natural language processing to achieve these tasks. Experimental results using reviews of five electronic products demonstrate the effectiveness of the proposed techniques, showing high precision and recall in feature extraction, opinion sentence extraction, and orientation prediction. The authors also discuss limitations and future directions, including the need to handle pronoun resolution, determine the strength of opinions, and expand the scope to include adverbs, verbs, and nouns.This paper addresses the challenge of mining and summarizing customer reviews for products sold online. The authors propose a method that focuses on identifying product features and the sentiment associated with them, rather than summarizing the text of individual reviews. The process involves three main steps: (1) mining product features from customer reviews, (2) identifying and classifying opinion sentences, and (3) generating a structured summary of the results. The system, called FBS (Feature-Based Summarization), uses techniques from data mining and natural language processing to achieve these tasks. Experimental results using reviews of five electronic products demonstrate the effectiveness of the proposed techniques, showing high precision and recall in feature extraction, opinion sentence extraction, and orientation prediction. The authors also discuss limitations and future directions, including the need to handle pronoun resolution, determine the strength of opinions, and expand the scope to include adverbs, verbs, and nouns.