Twitter is one of the most popular social networking and micro-blogging services in the world.
It allows account users to send 140-character updates on anything they choose, and for people to follow different users. It was created in 2006 by Jack Dorsey and now has more than 100 million users. Twitter is used to keep in contact with friends, to network and keep up-to-date professionally, and as a source of world news. Twitter is one of the 50-highest-ranked websites and is rising steadily.