A subject line is the text that introduces an email in the recipient’s inbox. It's your email's first impression. It’s a short but crucial piece of text that can determine whether someone opens your email or skips over it. A good subject line is clear, engaging, and aligned with the message inside.
To grab attention, subject lines often use personalization, timely relevance, or curiosity while avoiding spammy triggers like excessive punctuation. Thoughtful subject lines not only improve open rates but also set the right expectations for the content.