Feel free to spin in your chair while you wait Keep an eye on your email open rate to analyze and improve performance! Not just a pretty interface 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! A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Boost your email opens with a punchy subject line.