You may want to provide your customers with a discount code as part of a welcome email or as a thank you after they order.
Unique discount codes
Discount Ninja can generate unique discount codes for your users. This allows you to ensure each customer uses your discount code only once.
Discount Ninja can trigger private promotions for users that have access to a specific shareable link. You can create those links in the app.
To trigger the promotion from your email, add a button or link to your email (using your favorite email marketing tool) and point it to the shareable link.
The end result is an email that includes a button that sends your customers to your store with a unique discount code. The discount code is applied automatically and can be used only once.