It's a free service, provided by grazia.pro for shorten web addresses and other URLs like "mailto:"
The URL Shortener is useful in many circumstances, for example when sending an address to a mobile phone via SMS or sending Twits where the number of characters you can send is limited.
Anyway, for example, it's possible to transform the url of the research carried out on Google like:
Into something much shorter like:
How to use G77.it?
It's very simple, just paste the URL you want to shorten in the form and press "Shorten".
Suggested uses of G77.it