Abstract
With the spread of social media, word-of-mouth communication on the internet is greatly impacting companies and their products. People who sympathize with a topic, through social media, share their review with their friends or connections very rapidly. However, each review is subjective and is difficult to quantitatively assess. This report attempts to quantitatively asses user reviews on social media by analyzing changes in volume and quality based on five years worth of reviews on companies and its products. This method enables tracking of change in reputation of companies and its products as well as compare with rival companies and their products.