Try different email subject line styles to find what gets the most opens. Opening the door to unlimited creativity… 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Feel free to spin in your chair while you wait Boost your email opens with a punchy subject line. Want the loading time to be longer so we can spend more time together :) Sit up straight. A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails.