When shorten url's showed up for the first time they were great. We were starting the 140 characters era, and we wanted to share our stuff on the web. The problem was (and still is) that many url's that point to the stuff we wanted to share were way to big. Just look at those url's from amazon.
But this beautiful creation got us one ...tiny“ problem. Actually, the shorten url's didn't have nothing to do with the problem. The problem started when certain services we all use to share stuff with our pears started embedding shorten url's as a feature to their service. So when you're sharing your link you don't have to worry about shorten it. The link will be shorten for you. Great right?