First things first. Log in to Sleeknote - then go to 'Tracking Code' in the menu on the left.
Copy your tracking code.
Now you need to log in to your Big Cartel store.
From the admin area click on your name in the top right corner and click 'Customize Design'.
In the customize area, go ahead and click the 'Advanced' button in the top left corner.
Click on 'Layout'.
Here, you can see the entire code for the website.
Find the </body> tag (Use CTRL + F on Windows or CMD + F on Mac to search)
Insert the tracking code right above the </body> tag.
That's it. You are now ready to use Sleeknote in your Big Cartel store!