Twitter has revolutionalized the way people make presentations - "Create Twitter-Like Headlines". Read Carmine Gallo's How to be insanely great in front of any audience.
Twitter is another version of social networking that allows its users to microblog- send and read messages called tweets. Why it is working so well in marketing communication is because the tweets (or what was originally coined 'short burst of inconsequential information,' and 'chirps from birds') intrigue the reader(s) to find out more. Messages are also concise and use of trigger words to grasp attention, especially in today's overcommunicated society.