Join 4 million members in making awesome marketing content. Try different email subject line styles to find what gets the most opens. Let your imagination run wild. 51% of emails are opened on mobile devices - don’t forget to check the mobile preview for your email! Don’t forget to add a fun, relevant call-to-action button to your email. [insert fun loading text here] I’m worth the wait Don’t forget to add a short preview description to encourage people to click on your email.