Select the Insert section and then select More Gadgets.
Find and open the Insert menu in the Google Sites Editor. You should be able to see a list of available gadgets you can install on your site, including Tables, Links, and Images Click on the More Gadgets option. This will allow you to add customizable tools like POWr Membership Form to your site.
The Gadget manager will be visible. Click on Add Gadget by URL. Copy and paste this URL into the box. Click Add to finish.
Now that you've added your new, editable Membership Form Widget to your Google Sites page, you might want to resize the Widget. Using the options in the pop-up window, choose the height and width of your plugin. If you'd like, you can add a border, title or scrollbar to your Membership Form Widget, but we don't advise it. You’ll have more editing controls directly through the plugin.
Set up POWr Membership Form
Visit the live Google Sites website and select the settings gear in the top right corner of your Membership Form Widget.
In the POWr Editor, click Import Existing Membership Form, find Membership Form- and click Copy.