What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
The new Google Sites doesn't seem to be available on my account just yet, so I am unable to test it. However, I checked the Google Sites help page and it looks like to add a form to the google sites, simply click the INSERT button from the menu on the right and then select Embed URL. You can also check this guide for more info: Add text, images, & other content
To get the URL of your form, simply follow this guide: Where to Find My Form URL?
If you need further assistance, please let us know.