what is the purpose of JotForm?

JotForm is an online form builder that allows anyone to quickly create custom online forms. Its intuitive drag-and-drop user interface makes form building incredibly simple, and doesn’t require you to write a single line of code. Using JotForm, you can create and publish forms, integrate them into your site, and receive responses by email.

You can find more information about JotForm here: https://www.jotform.com/faq