Web from various studies show the popularity of

Web 2.0 is the second stage of development of the World Wide Web that is characterized by the growth of user-generated content and social media. In traditional World Wide Web (retroactively referred to as Web 1.0), data was posted on web sites, and users simply viewed or downloaded the content. On the other hand, Web 2.0 allows users to actively share knowledge through user-generated content to the global internet community. The term ‘Web 2.0′ was popularized by Tim O’ Reilly and Dale Dougherty at O’Reilly Media Web 2.0 Conference in 2004. Examples of Web 2.0 services include Blogs, Wikis, multimedia-sharing sites (e.g., YouTube, Flickr, and Instagram), social networking sites (e.g., Facebook and Twitter), and Mash up applications. Web 2.0 has several other names including Wisdom web, people-centric web, participative-web and read/write web 1. User -generated content is defined as voluntary contribution of individual to the world-wide web for either entertainment or for providing knowledge to other users across the globe. In other words, web users are no longer merely information consumers, instead they started playing many roles such as a critic, publisher, reviewer, journalist, economist, word spreader and many more. Such content exists in variety of forms like videos, reviews on products, status updates in social media, photos, Internet forums, Blogs, E-learning sites, and many more. Times Magazine has published an edition titled ‘YOU’ as the person of the Year 2006, a tribute to millions of anonymous web users who dedicated their creative energy for no cost but only with a view to help others 2. Moreover, the following statistics from various studies show the popularity of user-generated content: ? User-generated content is being produced and shared at very high rates, especially with younger people. It was found that 35% of all U.S. Internet users have posted content on the Internet, and 51% of users are under the age of 30 3. ? According to Folio magazine in December 2013, 80% of the available online contents are user-generated. 4 ? On an average, 70 million photos are shared per day in Instagram as per 2015 statistics. ? In Twitter, on average, more than 500 million tweets are shared per day. ? 72 million links are shared on Facebook per day 5.User-generated content analytics is considered as an invaluable and inexpensive source of for information dissemination and influence discovery. As will be discussed in the related work section, user-generated content analytics is heavily used to achieve advancements in various domains including health, disaster recovery, commerce, tourism, and economy to mention a few. The advancement in these domains can be achieved by performing data analytics on the user-generated content to extract information that was otherwise hidden. For example, in the tourism2domain, analyzing customer reviews enables the organizations to improve their services and to learn about users of similar interests. Finding out about users of similar interest can then be used to recommend services and destinations to customers based on the reviews of other customers with the same interest.