1. Don’t give it all away! Make your subject lines intriguing but a little vague.
2. Keep your subject line short and sweet.
3. Explore emojis but do some research before you use them.
4. Urgency in your subject line can be a very important factor to your customer’s opening your email.
5. Let your customers know that there’s an offer inside.
6. Use first names in your emails.
7. Pay attention to the preview text.