Like I said, most ESP (email service providers) have the capability of creating automated email workflows. So, instead of getting an email subscriber and initially sending them one or two emails, before getting distracted and forgetting all about them, you can be sure that you have emails sent to them over the course of a few days, weeks, months etc. with email automation.
Now, you can automatically send highly relevant emails encouraging them to buy the product or service they were considering. Customers who received multiple abandoned shopping cart emails are 2.4 times more likely to complete the purchase than those who receive only one followup email, according to Experian. Try sending the first message one day after, a second message 48 hours after, and possibly a third message within three or four days of abandonment.