Select the Insert menu and then select More Gadgets.
Open up the Insert menu in the Google Sites Editor You will be able to see a list of gadgets you can add to your site, like Links, Tables, and Images. Find and select the More Gadgets option. This will allow you to add customizable tools like POWr Social Stream to your site.
Copy and Paste URL
You will see the Gadget manager. Click on Add Gadget by URL. Then copy and paste this exact URL into the box. Click on Add to finish.
After you add your new Social Stream Widget to your page, you're probably going to want to adjust the shape and size of your Widget. Use the different options in the window to select the height and width of your plugin. You can decide to create a title, scrollbar or title around your Social Stream Widget, but we advise against it. You’ll have more editing controls directly through the plugin.
Set up POWr Social Stream
Visit your live Google Sites website and select the settings gear in the top right corner of the Social Stream Widget.
In the POWr Editor, click Import Existing Social Stream, find Social Stream- and click Copy.