Twitter is a microblogging service that lets users post short "Tweets" of up to 280 characters. These can also be posted via its API.
Twitter is a social networking and microblogging service that enables its users to send and read short status messages ("Tweets") - originally, up to 140 characters. Users can "follow" other users to build a social network, and can "retweet" messages they wish to propagate to their followers.
Private, direct messages to other users are possible, as well as public replies and "@mentions".
Messages can be tagged with particular topics using "hashtags" such as #stackoverflow
. Messages can optionally be geo-tagged if sent from a GPS-equipped device.
Tweets can also be posted, read, and searched via its API https://developer.twitter.com.