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. "Our charity nursery has improved their event marketing thanks to PosterMyWall flyers!" - Paula Sit up straight. Fighting off robots… Keep your email subject line short and attention-grabbing. Don’t forget to add a fun, relevant call-to-action button to your email. Try different email subject line styles to find what gets the most opens.