More than 70% of users who abandon your website will probably never come back unless they buy something from you, or you successfully get them to subscribe to your email list.
Email is private, personal, and by far the most direct form of communication on the internet. Most people check their inbox more than their social media streams. An email will stay in the inbox unless a user takes action on it. On social media, your message will get buried into user’s timeline.
Want to send email updates to subscribers when you publish a new blog post? check out this Guide to Using MailChimp and WordPress