Email subject lines can determine whether or not your email gets opened– or even noticed– in a crowded inbox.

Your subject line communicates your email’s value to the recipient and encourages them to read further and, potentially, to engage with your brand on a deeper level by responding to your call to action (CTA).

Email is the most profitable marketing channel (when considering ROI), so we’ve curated the best practices for email subject lines to make sure you can confidently leverage your best tool.