STEPS: 

1. Open your shop in Shopfactory.
2. Click on Properties >> Edit Website HTML

3. The “ADD HTML Code” window will appear. Click on the ADD icon.

4. The “ HTML Code Property” window will appear. Fill in the necessary information and add the Google Analytic code. Then under the “ Set Location” area, select radio button 2. This will correspond to the bottom of the page. 

Note: The reasonwhy the location is set on the bottom of the page is that when the code isadded at the bottom of the page, then the code is loaded quickly.

5. Click on OK.
6. Click OK again.

 This method will add the Google Analytics code to the restof the shop thus there is no need to add the code manually to each page.