HUB - How to create a Mailchimp newsletter?
1. Add your Mailchimp API key via Theme Options > API Keys > Mailchimp API Key, refer to this article to find more about MailChimp API. Once the API key is added, you are ready to add the newsletter element to anywhere on your website.
2. Add the Newsletter Element
3. Select your list from the dropdown to indicate where you'd like to add the subscribers.