How to Write Effective Subject Lines in 2024 and beyond
The last time I wrote a blog about subject lines was 15 years ago. And at that time, they played a vital role in the success of email marketing campaigns. The landscape has evolved considerably since 2009. With inboxes more crowded than ever and consumer attention spans shorter, writing an effective subject line has become even more challenging—and crucial. Today, there are new factors to consider beyond the basic do's and don'ts of subject line composition. While the core principles still apply, like avoiding spammy language and writing clear, engaging titles, there are new dynamics, such as personalization, mobile optimization, and algorithmic filtering, that have a huge impact on open rates. Your Decision to Open an Email The subject line is often the deciding factor in whether someone opens your email or not. However, thanks to spam filters, AI-based prioritization systems, and the sheer volume of promotional emails people receive, getting someone to actually see—and ope