It is estimated that by the end of 2018 there will be over 5.2 billion email accounts worldwide. In fact, despite what people may say (you know, that email is dead), email remains the most persistent form of communication in the business world.
Email is a personal way of reaching out to your customer base. In addition, it is excellent for sharing information about your company (think discounts, new product launches, and exclusive deals) and is cost-effective when used in conjunction with your existing marketing tools.