Nowadays, social media become a part of human daily routine. It is a common routine for people to share their activities, feelings and information using social media. They feel it is easy to connect using social media. This trend has become a daily routine for many people. This situation attracts scammers to find their victims on social media. Sentiment analysis is one method that can prevent scammers' activities by analysing text contents such as social media posts, reviews and comments. A few techniques can be considered for developing sentiment analysis. The data, environment and situation are elements that developers should study before deciding the techniques to be used for developing sentiment analysis.