A campaign nearly completely conceived of, and orchestrated on, twitter. A twitterpaign will contain a hash-tag (#) next to key words to influence twitter trends. Twitterpaigns ask followers to do something: retweet, blog, email, online petition or voting.
Currently, a number of celebrities are asking followers to vote for them for the People's Choice Awards. Example tweet: "Did everyone vote today for @NathanFillion (moi) #peopleschoice"
Twitterpaigns can be retaliatory. Comments made by a Marie Claire blogger about the "fatties" on the CBS show "Mike & Molly" provoked a twitterpaign. The blogger's twitter page was "blasted", tweets called for blogger's firing & requested followers retweet.