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".
How does Twitter make money: Almost all of Twitter's revenue - about 85% of it - comes from advertising on its site. Data licensing is Twitter's second major revenue stream.
Twitter Company Information link: https://about.twitter.com/company
Official Account of Twitter Investor Relations link: https://twitter.com/twitterIR
Twitter Insider Trades: http://www.secform4.com/insider-trading/1418091.htm Twitter Company fillings (SEC):