Twitter is one of the most well-known online social networks that enjoy extreme popularity in the recent years. The service they provide is referred to as microblogging, which is a variant of blogging where the pieces of content are extremely short-in the case of Twitter, there is a limitation of 140 characters like an SMS for each tweet. Different from other social media platforms, such as Facebook, the Twitter network is not bidirectional, meaning that the connections don't have to be mutual: you can follow users who don't follow you back, and the other way round.

Traditional media is adopting social media as a way to reach a wider audience, and most celebrities have a Twitter account to keep in touch with their fans. Users discuss happening events in real time, including celebrations, TV shows, sport events, political elections, and so on.

Twitter is also responsible for popularizing the use of the term hashtag as a way to group conversations and allow users to follow a...