Last week Google introduced its own short URL Goo.gl and now YouTube follows and has its own short URL – YOUTU.BE too. YouTube has used a Belgian domain, Youtu.be. These short URL’s are for YouTube videos and be used in conjunction with the Auto Share function and also all videos on the website through these

Some common URL shortening services are bit.ly and tinyurl.com. Initially, goo.gl is not a stand-alone service as bit.ly BUT is only available from the Google Toolbar and Feed Burner.
Google URL Shortener at goo.gl is a service that takes long URLs and squeezes them into fewer characters to make a link that is easier to share,

Google now automatically uses shortened links in the mobile version of Gmail. Longer links are now automatically reduced and converted to readable links, which Google called Smart Links. Thus, for example, a link to Google Maps into a link with the actual address as under the permalink in the screenshot. The