What is Jotform actually?

You might want to check our FAQ section. https://www.jotform.com/faq/. To quote it here;

JotForm is a powerful online application 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.