Twitter is an online social networking service and
microblogging service that enables its users to send and read text-based
messages of up to 140 characters, known as "tweets".
Twitter was created in March 2006 by Jack Dorsey and by July, the social
networking site was launched. The service rapidly gained worldwide
popularity, with over 500 million registered users as of 2012,
generating over 340 million tweets daily and handling over 1.6 billion
search queries per day. Since its launch, Twitter has become
one of the ten most visited websites on the Internet, and has been
described as "the SMS of the Internet." Unregistered users can
read tweets, while registered users can post tweets through the website
interface, SMS, or a range of apps for mobile devices.