We are using Mailchimp official WordPress plugin for this theme. It’s available in the WordPress.org
You will be notified to install this plugin after active this theme. After install and active this plugin you are going to need configure this plugin.
Navigate to Mailchimp. Here you need to put you Mailchimp API key. After putting the API key status will say connected like the screenshot bellow.
If you status is become connected, Navigate to Mailchimp > Forms. Here you can create your customized forms.
Create a form using the code bellow for showing a form like our demo.