Is anyone even reading this? Keep your email subject line short and attention-grabbing. I’m worth the wait 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! A mobile-responsive email can increase clicks by 15%. Always check mobile previews before sending out emails. Don’t forget to add a short preview description to encourage people to click on your email.