The subject line is probably the most important part of your email content. According to statistics from Convince & Convert, 33% of email recipients open email based on subject line alone.
There are a few guidelines to keep in mind when writing a subject line:
- Be clear and specific. Center the subject line around the topic of the email.
- Keep it simple – perhaps offering one key takeaway from your message.
- Create urgency by using phrases like “ends today” or “register now”.
- Don’t put words in all caps or use excessive punctuation to indicate importance.
Personalization is also a key factor in open and click through rates. It’s easy to include your subscriber’s name and other subscriber data in the subject line or body of the email – so do so liberally.
Typically, email client’s inbox interfaces show about 60 characters on an emails’ subject line. Mobile devices show about 25 to 30. A good rule for subject line length is to keep it around 6 to 8 words, placing any key words at the beginning.