Allow customers to subscribe to your MailChimp or CampaignMonitor mailing list(s) via a widget or by opting in during checkout.
Go to WooCommerce > Settings > Newsletter to configure the plugin.
The Newsletter Subscription extension allows you to easily integrate with MailChimp and CampaignMonitor via bespoke options screen in the WooCommerce settings. There is a dashboard widget which displays recent subscriber activity and a widget for placing a signup form in your sidebar or any other widgetised areas. On the frontend a subscribe checkbox is inserted at the checkout and users can subscribe on any page in which you place the widget.
The newsletter subscription extension supports MailChimps Ecommerce360 service which allows you to gather further analytics on your email campaigns with regards to purchases.