Choose Insert, then More Gadgets.
In the Google Sites Editor, find the Insert menu, and open it. You should see a list of available components and gadgets you can add to your site, like Images, Links, and Tables. Find the More Gadgets option, and click it. This allows you to install customizable tools such as the POWr Pinterest Feed to your site.
Copy and Paste
The Gadget manager will appear. Choose Add Gadget by URL. Then copy and paste this exact URL into the box. Choose Add to complete.
Adjust Height and Width
Now that you’ve added your new, customizable Pinterest Feed Widget to your Google Sites page, you’ll probably want to adjust the size and shape of the Widget. Use the options in the pop-up to choose a height and width for your plugin. You can also choose to add a border, scrollbar, or title around your Pinterest Feed Widget, but we don’t recommend it. You will have more editing options through the plugin.
Set up POWr Pinterest Feed
Go to your live Google Sites web page and select the settings gear in the top right corner of your Pinterest Feed Widget.
In the POWr Editor, click Import Existing Pinterest Feed, find Pinterest Feed- and click Copy.