Before getting into what is email marketing in digital marketing, letâ€™s have a look at some of the facts about Email Marketing: 64% of Small Businesses use Email Marketing to reach new customers. 31% of B2b marketers say that email newsletters are the best way to nurture leads. Email marketing has an ROI (Return on Investment) of 4200% i.e., for every $1 spent youâ€™ll get 42$. In the majority of the people their email address remains the same, that automatically proves how important email marketing is. As per statistics, you can clearly see that email marketing is one of the pillars of having a successful business.