Here's a trick to use if you have competitors etc that use goo.gl links instead of bit.ly links. Some of you may know this but some of you may know so here it is. If you add the words .info to the end of any goo.gl link it will give you a full analytics for that link such as how many clicks it has had, where the click come from, what devices were used and other valuable info. So lets say the link is goo.gl/fghTT4t you just need to add .info to the end so the link would now look like this goo.gl/fghTT4t.info and you will see all the information. I decided to stop using goo.gl shortener for this reason and now I use it to get info on my eCommerce competitors. Bitly is much more secure against this.