With the rise of social media, people started sharing opinions or experiences, exchanging ideas, providing suggestions etc. by using different means of online communication. We, the human beings, like to take the opinions or suggestions of our loved ones for taking decisions in our day-to-day activities. Nowadays, online opinions are playing a central role in people decision-making process. When it comes to online scenario, these opinions can be expressed in different forms on different online environments - people use online social networks like Facebook to express their feelings in the form of a post; micro-blogging websites like Twitter provide people away to interact and share their thoughts globally in the form of a tweet; users write reviews about products or services on review platforms to share their experiences; people taking advice or leaving comment on a blog network; discussion forums provide rich content to people to have discussions on different topics of interest in the form of question/answer posts or comments;