Twitter is a free social networking and micro-blogging service that allows users to send “updates” (or “tweets”; text-based posts, up to 140 characters long) to the Twitter website, via short message service, instant messaging, or a third-party application such as Twitterrific. …
I have not tried it as yet. But Hillary and Obama use it.
twitter – official website
Rick McCharles 
I also haven’t tried it, but a friend of mine blogged about it a while ago (https://rickmccharles.com/?p=1700#more-1700) .