Go to Your Account > Shop Settings (far left) > Options > Web Analytics
There will be a box that says Web Property ID.
On your GA page, you already have had to enter in your website's URL (www.etsy.com) and your account name (kitsnbits.etsy.com).
You will see a UA-number on your GA account page (where it lists your accounts/web sites). It looks like this: UA-12345678-9
Copy and paste this web property ID into the box on the Web Analytics page on Etsy.
It takes 12-24 hours for GA to start tracking your shop page. You DO NOT need to put a code on each page, just the one UA-number. Even after GA starts tracking your page after 24 hours, it might need another 24 hours to get a day's worth of information. At first there might be a yellow triangle symbol that says "page not tracking." Wait 24 hours to see if those goes away. It should be replaced with a green check when it is.
Here are some helpful links:
http://www.etsy.com/help/article/230http://anitaspottery.blogspot.com/p/set-up-google-analytics-on-etsy-simple.html