Customers engage with transactional emails such as order, shipping and return/exchange notifications at a much higher rate than they do with promotional and branding-focused campaigns. It is clear from the total open rates that customers open transactional emails repeatedly. The exceptionally high open and click rates underscore the opportunity for companies to cross-sell products and services to highly engaged customers through transactional emails.
When it comes to designing an email for a specific offer, the main component to keep in mind is the offer itself. You want the copy to be brief but descriptive enough to convey the offer's value. In addition, make sure your email's call-to-action (CTA) link is large, clear, and uses actionable language. You can also include a large CTA image/button underneath to make the action you want email readers to take crystal clear.