Magento MailChimp Configuration

1. Log into your account on mailchimp.com.

Account

1. Once you are logged in, navigate to your account.
2. Select "Profile".

Profile

1. Navigate to the "Extras" tab.
2. Select "API keys".

API keys

1. Press the "Create A Key" button.
2. Copy your Mailchimp API Key to the clipboard". (This Key will be required it in the Magento backend > Newsletter Popup configuration > "HubSpot" Integration.)

1. "Enable": if enabled, this option allows you to transfer collected emails to your Mailchimp List(s).
2. "API Key": paste the API key created in your Mailchimp account
3. "Test connection": press the button to test whether the connection is set.
4. Option "Contact Lists": shows contact lists available for synchronization. Admin will be able to choose the contact list(s) to subscribe a user to in each newsletter popup individually.
5. Option "Double opt-in": allows admin to activate Double opt-in. Note: For more information about double opt-in process in MailChimp please read this article.
   
6. Option "Account Details": shows your MailChimp Account details. (They will appear after you indicate your Mailchimp API Key)
7. Option "Fields Mapping": lets you to setup a relation between your newsletter popup fields and MailChimp list fields. This will allow you to save your newsletter subscribers additional data (including Coupon Codes) directly to your Mailchimp account. Also it lets you send a Welcome Email to your subscribers automatically, using MailChimp service instead of Magento.

1. "Enable": if enabled, this option allows you to transfer collected emails to your Mailchimp List(s).
2. "API Key": paste the API key created in your Mailchimp account
3. "Test connection": press the button to test whether the connection is set.
4. Option "Contact Lists": shows contact lists available for synchronization. Admin will be able to choose the contact list(s) to subscribe a user to in each newsletter popup individually.
5. Option "Double opt-in": allows admin to activate Double opt-in. Note: For more information about double opt-in process in MailChimp please read this article.
   
6. Option "Account Details": shows your MailChimp Account details. (They will appear after you indicate your Mailchimp API Key)
7. Option "Fields Mapping": lets you to setup a relation between your newsletter popup fields and MailChimp list fields. This will allow you to save your newsletter subscribers additional data (including Coupon Codes) directly to your Mailchimp account. Also it lets you send a Welcome Email to your subscribers automatically, using MailChimp service instead of Magento 2.
8. Press the "Save config" button to save your changes.