How to change simple unsubscribe/confirmation message with some beautiful design page
To stay in the good books with your subscribers, show something good even when they unsubscribe. Alternatively, you can redirect them to a page where you have listed your products or a sweet welcome message.
Step 1: Go to WordPress Dashboard -> Email Subscribers -> Settings -> Sign up Confirmation
Step 2: Scroll down to find “Page to show after an email address is unsubscribed”
Step 3: Select the page you want to show once user unsubscribes your newsletter.
Step 4: Save the settings. That’s it!