Twitter is a free social networking and micro-blogging service that enables its users to send and read messages known as tweets. Tweets are text-based posts of up to 140 characters displayed on the author's profile page and delivered to the author's subscribers who are known as followers. Senders can restrict delivery to those in their circle of friends or, by default, allow open access. Users can send and receive tweets via the Twitter website, Short Message Service (SMS) or external applications.  On twitter you will find tweets regarding fashion and apparel.

Because twitter allows only 140 characters, making the URL's smaller allows you to fit more meaningful text in your message and not waste to many characters on the actual website address you include with the message.

Learn more about making URL's smaller.