Don’t forget to add a fun, relevant call-to-action button to your email. Keep your email subject line short and attention-grabbing. Opening the door to unlimited creativity… One Mississippi, two Mississippi… Get creative with emojis in email subject lines to increase open rates! 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Keep an eye on your email open rate to analyze and improve performance! A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails.