Do you have a Google Analytics account setup already? If so, we just need the "Tracking ID/Code Snippet" to place this on every page of your website. Here are some instructions on how to find your tracking ID/code snippet: https://support.google.com/analytics/answer/1008080?hl=en
If you don't have a Google Analytics account, just go here and click "Sign Up". Then just follow the process to set up your account and get the Tracking ID needed.