Your subject line is arguably the most important element of your email marketing campaign. This free guide, How to Write Email Subject Lines, will teach you everything you need to know about making this first and fundamental impression on your recipients. Inside you'll discover how to make an email worth a subscriber's time and show value from the jump while keeping the content crisp and professional. Keep the call to action engaging without being spammy, establish familiarity and present offers with a healthy balance of text and images. That's right - we'll even give you a few tips on formatting content.