Yes, you can send an email to your customers who purchased certain products on your WooCommerce store with AutomateWoo.
The above workflow will search for customers who purchased “Beanie” product, in my example, and it will make sure to send the email once per customer using “Workflow – Run Count for Customers equal 1”.
I use a manual workflow because my goal is to run an on-demand action for existing customers, not a live-action when a new order is coming.