What best practice should you follow for email subject lines in Marketo?

Keeping email subject lines concise and relevant is a best practice in email marketing, particularly in Marketo campaigns. The primary goal of a subject line is to grab the recipient's attention and encourage them to open the email. Conciseness helps to ensure that the subject line is fully viewable in email previews and on mobile devices, where space is limited. When subject lines are relevant to the content of the email, they set the right expectations for the user, which can enhance engagement and trust.

Short and clear subject lines often lead to better open rates because they are easy to read and understand at a glance. Moreover, relevant subject lines tailored to the audience's interests or needs can significantly improve the chances that recipients will engage with the email content. This approach aligns with best practices regarding user experience and email marketing effectiveness in Marketo and beyond.