A good cart abandonment email includes a prominent call-to-action and some compelling copy to remind the customer why they should complete the sale. The email from Growlerwerks below is a good example of this. It contains not just a large “Finish Order” button, but also some copy telling customers what they’ll get as a result of their purchase (”enjoy fresh craft beer for weeks”.) It even includes a hero shot of the product in action.
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.