most of the people are now using twitter for spamming purpose. but using twitter u can directly talk to company official which was not possible earlier.
but i dont see how people can get traffic from it.. it looks so plain and you just follow people?.. i have no clue what to do with mine.
simple tip: follow people who you think would be interested in you website topic, and tweet abt your site if they like your content you get visitors, i dont think it could get more simple then that (^_^)
but when i click follow.. that means when they update their status, it shows up on my page?? how do they know to follow mine??