Welcome notifications are a great way of instantly engaging your latest visitor to subscribe to your notifications.
In order to enable welcome notifications for your store, click on 'Automation' (red arrow).
Now, click the trigger (blue arrow) for 'Welcome Notification' to enable it.
You can customize your welcome notification by changing the default message.
By sending a discount code or information on the latest promotions / offers, you can boost your chances of making a sale on your new subscriber's first visit to your store. Even a simple thank you message does the trick in making your subscriber feel valued.