To integrate with Shopify:
You can install the code manually. In order to do so, please, follow these steps:
To manually install, please follow these instructions:
Login into your Shopify account.
In the menu on the left side click Online Store. Then, Themes. Press Customize theme.
3.Next, navigate to Theme options and click the Edit HTML/CSS option. Please, see the screenshot below.
4.In the Layout folder choose your theme (theme.liquid on the example below). Scroll down to the footer. Then, paste the Picreel code that you get in your account. Click Save.