I need clarification on how this system works

JotForm is online form builder that allows users to create forms using a drag and drop creation tool. Once you create your form you can embed it to your website or provide your users direct link of your form. Submitted data will be stored on our servers and you will be able to see them on your account. 

More about JotForm you can find here: https://www.jotform.com/faq/ 

This guides can help you to create your forms:

https://www.jotform.com/help/2-How-to-create-your-first-web-form 

https://www.jotform.com/help/ 

Hope this will help. Feel free to contact us if you have any other questions.