The email widget allows you to collect your page visitors email addresses. It requires 3 pieces of information from your Mailchimp dashboard. This tutorial will guide you through finding each piece of information.
How to Locate Your Mailchimp API Key
Step 1: Click on your account name in the bottom-left menu bar. Select Account from the popup menu.
Step 2: Click on the Extras menu. Choose API keys from the drop-down menu.
Step 3: Click on 'Create A Key' and copy the created key.
To find your Mailchimp server prefix, log into your Mailchimp account and look at the URL in your browser. You'll see something like https://us19.admin.mailchimp.com/ ; the 'us19' part is the server prefix.
Login to your MailChimp account and select 'Audience' from the left menu.
Click on the 'Manage Audience' dropdown, then select 'Settings'.
Click on 'Audience name and defaults', your List ID will be on the right side under 'Audience ID'