Twitter is an online social networking service that enables users to send and read short 140-character messages called "tweets". Registered users can read and post tweets, but those who are unregistered can only read them.
Twitter is a free microblogging web app that lets users share messages of up to 140 characters† in length. These messages are known as "tweets". You can upload images along with tweets too.
Related tags include:
Terms associated with Twitter are
- How can I see who I've blocked?
- Find out all the users who retweeted you
- Searching within someone's tweets
- Making your tweets private
- How can I follow someone on Twitter without them knowing?
Other social networks
† 280 characters for some.