Select the Insert section then select More Gadgets.
Open up the Insert menu in the Google Sites Editor You will see a list of components you can embed on your site, like Tables, Images, and Links. Select More Gadgets. This allows you to install customizable tools such as the POWr Comments to your site.
Copy and Paste URL
The Gadget manager will be visible. Click Add Gadget by URL. Then paste this URL into the field. Click Add to finish.
After you add your new Comments Widget to your page, you're probably going to want to adjust the shape and size of your Widget. Using the options in the pop-up, pick a height and width for your plugin. We don't recommend it, but you can insert a scrollbar, title or border to your Comments Widget. You will have more editing options through the plugin.
Set up POWr Comments
Visit the live Google Sites web page and select the Settings Icon in the upper right corner of your Comments Widget.
In the POWr Editor, click Import Existing Comments, find Comments- and click Copy.