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.
Yes, you would need to embed the form to your website. Or, you can give the form direct links. It's up to you by the way. Check this guide: Which Form Embed Code Should I Use?.
Here's our guide on how to integrate your form to Mailchimp: MailChimp Integration. Here's how you can get your Mailchimp API Keys: http://kb.mailchimp.com/article/where-can-i-find-my-api-key.
Let us know if you require any further assistance.