International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Word of mouth is one of the way of marketing, and its usage is increasing because today marketing becomes more expensive and less effective. In the past, word of mouth was limited to person-to-person communication. Today, the internet allows conversations which are spread all over the world and influence millions of people. This fact, changes way of marketing from traditional person-to-person communication to online reviews, which is considered a key factor for purchasing decisions in marketing. These reviews are important to customer and to companies or vendors. Customers use the reviews to make decisions regarding quality of product which they are going to buy.