Founded in 2006 by Jack Dorsey, Noah Glass, Biz Stone and Evan Williams, Twitter is an online social networking and microblogging service that enables users to send and read 140-character messages called tweets.
In 2012, Twitter partnered with Yandex, a Russian search engine, and acquired the video company, Vine, which launched in January 2013. The app allows users to create and share six-second looping videos.
In 2013, Twitter acquired Trendrr and MoPub. Twitter made an initial public offering in November 2013. Jack Dorsey was named CEO in October 2015. At the same time Adam Bain was appointed COO and Anthony Noto CFO.