There are several additional advantages of having short URL:
- Some long and complicated addresses might break up in the email text, and therefore become unclickable. User has to copy and past the URL to the browser to make it work.
- If you want to hide your referral ID in the address to avoid reader’s perception that you might benefit from his click on the link, this is a good solution.
- If you need to give the address by phone or SMS and do not want to mess up with long strings.
- If you want to check the profitability and effectiveness of different marketing channels, you can, among other methods, assign different short URLs to each channel to evaluate.
- Not that I am fan of the “black hat” sites promotion techniques, but having multiple redirection URLs for your site might be handy.
http://www.rateitall.com/t-26841-free-short-url-redirection-services.aspx