Start by navigating to your Shopify dashboard > Apps > Personal Discount > Add automation. Select Omnisend as your Email Service Provider and the Campaign Type is Welcome new subscribers.
Now set your automation details such as the code pattern, the discount value, the expiration date, etc. Take a look at the article on how to configure discount to modify it to best suit your need.
When you have finished this process, Save your automation and copy the code snippet to the clipboard.
Switch over to the Omnisend admin panel. Navigate to the Automation section from the top menu. Then hit the link Explore all workflows > Create custom workflow.
Set the automation trigger. Click on Select trigger and pick Signup from the dropped-down menu.
Add an action that will be performed when a subscriber joins your newsletter. Drag and drop the Email element to your automation. Then fill in message fields such as subject, preheader, etc. Hit Edit content and Save your automation.
Let's move on to editing the email. Customize your message template and add the Personal Discount code snippet there. To do this, click on Quick add and drag an HTML element to your template. Then delete the default code snippet and paste the one from Personal Discount. When your email template is ready, hit Finish editing.
Now it's time to Start workflow.
From now on, your customers will receive a message with a discount code, when they sign up for your newsletter.