Google recently announced g.co as the official URL shortcut for official Google products and services. g.co will only link to webpages owned by Google and only Google can create the g.co shortcuts. This means that you can trust the shortened link.
This is good news for educators who want to use and share Google's many tools with their students or other educators. The short links will make it easier to share these great resources.
Google still has the public URL shortener goo.gl available for the public to use.
My Top 10 Free Google Resources for Education