On forms, when you solicit a persons email, you can also automatically have that email added to your MailChimp mailing list. There are 3 steps you need to follow.
1. You first need to tie your brand to a particular mailchimp mailing list. You do so by going to the setup tab and then select mailing list.
2. Then on the forms you want to integrate, you add an email field and click the checkbox to have that email added to your MailChimp account.
3. In the forms settings, you will need to specify which MailChimp account/list to associate with this form in the MailChimp List field.
Key Words : mail chimp