In today's world, internet evaluations are critical in influencing customer purchasing habits and improving worldwide communications among consumers. Internet giants like Amazon and Flipkart provide customers an opportunity to share their experiences and thoughts about the product's performance with respective customers. Classification of reviews into positive and negative sentiment is needed in order to obtain useful information from a huge number of reviews. When it comes to extracting subjective information from texts, Sentiment Analysis utilises computer algorithms. One of the most important NLP (Natural Language Processing) jobs is sentiment analysis, often known as opinion mining. The field of sentiment analysis have got attraction. It is one of the basic issues of sentiment analysis to solve the problem of sentiment polarity classification. A generic sentiment polarity classification method is provided along with comprehensive process explanations. This study's data comes from online product evaluations gained from sites like Amazon, Flipkart, eBay, and others that influence online shoppers. Text processing methods were used to preprocess customer evaluations of products. The Product review files are produced as a flat-file during pre-processing. After eliminating the stop words, the flat file is tokenized and the keywords are listed. Each word's frequency has been determined, and the subject with the greatest frequency count has been extracted. Similar comments are grouped together in each subject, and the resulting words are then categorised as either positive or negative. For ease of understanding, a chart is created from the categorised comments. Nave Bayes, Support Vector Machine (SVM), Decision Tree, and k-Nearest Neighbor are just a few of the classification models that have been used to classify user evaluations. Models are evaluated by utilising 10-Fold Cross Validation (FCV).