URL shorteners have played a large roll in making Twitter awesome because without them you would not be able to post most links on Twitter because of the 140 character limit. My favorite URL shortener is Bit.ly because of the super short URLs and the way that it counts how many people click your links.

The only downside to URL shorteners is that you do not know where the links are going to take you. Even if someone says that it is going to take to you their article about cooking it may take you to a site that downloads viruses to your computer.

So watch out. Make sure that you are only clicking the links that the people you trust have posted.

UPDATE: Find out how to unmask shortened URLs here!