It starts with a few self-promotional tweets and it can move on to regular communication with key customers or vendors and even twitter-based promotions like tweetups (live meetings amongst twitter fans) and scavenger hunts for your customers with jewelry prizes. There's a lot here - and it could mean good business.
Who’s Driving Twitter’s Popularity? Not Teenagers - NYTimes.com.
Another reason that teenagers do not use Twitter may be that their lives tend to revolve around their friends. Though Twitter’s founders originally conceived of the site as a way to stay in touch with acquaintances, it turns out that it is better for broadcasting ideas or questions and answers to the outside world or for marketing a product. It is also useful for marketing the person doing the tweeting, a need few teenagers are attuned to.
“Many people use it for professional purposes — keeping connected with industry contacts and following news,” said Evan Williams, Twitter’s co-founder and chief executive. “Because it’s a one-to-many network and most of the content is public, it works for this better than a social network that’s optimized for friend communication.”