I still get the question from relatives, "what do you use Twitter for?"
Twitter is no Facebook, so the value of a 140 character "tweet" just doesn't appeal to them as much as status updates, "likes," and photo albums from friends and loved ones.
But while not as meteoric as Facebook (more than 1 billion users worldwide), Twitter's base of users continues to grow - there are now more than 500 million Twitter users worldwide.
In its most recent report, the Pew Research Center found that 15 percent of online adults user Twitter:
...the proportion of online adults who use Twitter on a typical day has doubled since May 2011 and has quadrupled since late 2010.
Twitter CEO Dick Costolo (or @dickc) is a University of Michigan graduate (#goblue). He will return to campus this Friday to talk about his business (Nov. 16).