Email Marketing RulesHoliday Subject Line Insights to Boost Your Results
During the holiday season, even the most loyal customers may only give your messages a quick glance. So, it is essential for email subject lines to communicate value and capture attention efficiently.
To identify compelling subject line tactics, Zeta Global examined the subject lines of approximately 22,000 campaigns sent by retailers during the 2025 holiday season. We organized the most commonly used words into six major themes and then correlated those word groups with open and click metrics.
Let’s look at each theme and its effectiveness.
>> Read the entire post in Zeta Global’s Resource Center
Welcome! Email Marketing Rules is your guide to understanding the best practices of this complex, often misunderstood channel as you craft the best executions for your brand. Every week, we’ll explore strategies and tactics, discuss tips and inspiration, and dig into industry news and trends.
Chad S. White
GVP of CRM Strategy
Zeta Global
Author of Email Marketing Rules and nearly 4,000 articles about digital and email marketing
