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.
We have a guide on how you can add form to Wix: http://www.jotform.com/help/70-Adding-a-form-to-Wix-Site
Let us know if you need any further assistance.
I know that it's possible also to embed a JotForm in WIX via a site URL
My question is to understand what is the best method to use and why ?
Embed via a site URL
or ... Embed via HTML code
Thanks for clarifying
The HTML Code is the best way to embed the form. You should also use our iframe embed method (http://www.jotform.com/help/148-Getting-the-Form-iFrame-Code).
This is recommended so that the form will be fully embedded in the page using its own embed codes. If you will use the Site URL method, there's a chance that the form won't appear in the page. But you may consider trying to see if that works ;)
Let us know if you need any further assistance about this matter.