It’s very easy to add Common Ninja’s HTML code to Google Sites.
1. First, copy the app’s HTML code. To do so, in the app’s dashboard, go to “Add to Website”. Here, click on the green button (it will automatically copy the code).
2. Next, open your google site and click on “Insert”. Then, click on “Embed”. Choose the option to “Embed code” and paste the code you’ve copied before into the field. Click “Save”. That’s it. You should see Common Ninja’s app on your page.