This plugin integrates your app with Mailchimp so that you can manage your app user engagement with email newsletters, special offers, auto-responding, or other email marketing activities and get an engagement insight in Mailchimp (When you work with CRM 'My Customers' plugin installed).
Simple and straight-forward integration
All it needs is the Audience ID & the API Key from the Mailchimp account into your app to start pushing your user emails into Mailchimp. Then you can subscribe or unsubscribe the users from within your app.
You can use the Export feature in your app to export all of your existing contacts into your Mailchimp Audience. You might want to use this if you're just starting with this plugin and your app has a tone of existing contacts to be exported to Mailchimp.