So, what do people use Twitter FOR?

Well, according to a report from The Pew Center:

72% of Twitter users say they post updates about their personal life, activities or interests.
62% post work-related updates.
55% use Twitter to share links to news stories.
53% use the service to retweet other's material.
40% use the service to share photos with others, while 28% use it to share videos.
24% tweet their location.