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! One Mississippi, two Mississippi… My day’s been ok, how’s yours? Want the loading time to be longer so we can spend more time together :) Keep your email subject line short and attention-grabbing. Fighting off robots… Keep an eye on your email open rate to analyze and improve performance!