February 18, 2011
When it comes to URL shorteners for services like twitter and facebook there is a lot of confusing information out there.
URL shoterns use something called a 301 redirect and not all information, like the full url is passed on in a re-direct.
About the 301 redirect
A 301 redirection in essence is a technique used to change a link address. The problem with changing link address is you lose any existing page rank or link juice. In general it is better to not use redirection as a means of building links.
Goo.gl uses a 301 re-direct that does pass on the full url. What this means is that link juice and page rank are maintained in the url when it passes through the redirection.
What are link juice and page rank?
Link juice describes the power of an inbound link using factors like page rank. Page rank is a numerical value given to a page based on the number of links it has to it as one of the factors.
The advantage to Goo.gl
Get detailed click through rates. Get a QR code for the shotened link. QR codes are a bar code like what you see on retail packaging. If you place a QR code with a link to your website on a business card for example; Someone can scan the code on their smart phone and go directly to your website. You then receive the data on that visit as well.
Other information tracked includes, referrer source, country of origion, web browser used and platforms.
There are many url shortening services available, but the advantage to using goo.gl is quite clear.