5 of 12Image
Advertising is absolutely crucial to defending Twitter's value. Some of its more notable schemes include Promoted Tweets, Promoted Accounts, and most recently, targeted advertising tied to television programming.
Do you remember your first Tweet? Well, we all got a look at the first Tweet from anyone in Twitter's S-1 filing, courtesy of co-founder Jack Dorsey. He didn't even use up all of the 140-character spaces at his disposal.
(He also appeared to be a fan of that Web 2.0/3.0 trend of dropping the vowels. Let's all rejoice that they kept those in the official moniker after all.)
Another use case touted by Twitter: an emergency response tool by government officials and relief organizations, as demonstrated by this Tweet sent by New York City mayor Michael Bloomberg during Hurricane Sandy in November 2012.