Technology in the current era has developed greatly in society. The internet helps people search for information or communicate with each other. There is one internet provider that provides internet services, namely "First Media". This provider also has a service account on Twitter with the name @FirstMediaCares which aims to provide feedback from customers who use services at this provider. So the aim of this research is to be able to analyze sentiment in feedback or tweets provided by customers or consumers. There was 845 data pulled from the account from August to September. Then it is processed again to become 310 valid data that can be used for analysis. The algorithm used is Naïve Bayes, which is a classification method that can determine probability based on past experience.
 Keywords: User Satisfaction, Review Sentiment, Wi-Fi First Media