Select the Insert menu and then click More Gadgets.
Open up the Insert menu in the Google Sites Editor You should see a list of available components and gadgets you can add to your site, like Images, Links, and Tables. Click on the More Gadgets option. This lets you add editable tools such as the POWr Reviews to your page.
Copy and Paste URL
The Gadget manager will appear. Select Add Gadget by URL. Then add this exact URL into the field. Click Add to finish.
After you add your new Reviews Widget to your page, you're probably going to want to adjust the shape and size of your Widget. Use the options in the pop-up to choose a height and width for your plugin. If you'd like, you can add a border, title or scrollbar to your Reviews Widget, but we don't advise it. You'll have more control while editing right through the plugin itself.
Set up POWr Reviews
Visit your live Google Sites website and click the Settings Icon in the upper right corner of the Reviews Widget.
In the POWr Editor, click Import Existing Reviews, find Reviews- and click Copy.