To integrate Picreel with Magento, follow these steps:

1. Login into your Magento admin section.

2. Click the System tab across the top of your page.

3. Select Configuration.

4. Click Design on the left menu.

5. Select Footer and paste Picreel code in the Miscellaneous HTML field. 

Your Picreel code can be found by logging into your account and clicking on the Campaigns section. Just click View code and you will see a snippet similar to this:

6. Don’t forget to click Save at the top, when you are done with pasting the code.