An Email Trigger Template allows you to save all the details necessary to trigger an Email Sending as a Template. Herein, you save all the Email Sending details like the Sender name, the Sender Email, the Email subject and preheader, etc. as an Email Trigger Template.
How that helps you:
When you create a signup form to sign up customers’ Emails via a single opt-in, you can configure the Email Trigger Template to be auto-sent to customers on successful signups.