While this might seem surprising at first, think about your own online behavior: When you sign up for a website (like an online store), you have to enter your email address to create the account. You even need an email address to create a Facebook or Twitter account. What’s more, Facebook and Twitter email to notify users of activity, like when someone is tagged in a photo.
No matter what type of email you’re sending, the bottom line for every type is value. Every email should provide something valuable to your audience, whether that’s a perfectly timed offer, a lead-nurturing message tailored to where the user is in your funnel, or a newsletter packed with interesting, relevant content. And because user experience matters, it should be easy for users to see that value quickly through simple, easy-to-read and mobile-optimized messages.