You can use Google Analytics to see how many people are visiting each of your web pages, how long they stay, where they are from, and lots of other statistics. Most website owners are surprised by how many visitors they really have.
When asked to paste Google's tracking code on your Extend website, make sure to paste it in the Global Custom Code window:
Google's instructions will tell you to insert the code within the <head> tag. Pasting it in the Global Custom Code window will accomplish this automatically. You will not need to add anything.