Why is building an email marketing list so important? The fact is that email still remains as the top marketing promotional tool and its results outpace all of social media combined. Consider that the number of email users globally is over 2.6 billion and those users login every day to explore new ideas, strategies to help their company, and vendors that they want to connect with. Email, combined with social media and website lead tracking, drives viewers into your environment, creates calls to action, and generates leads. And/....email marketing is still one of the least expensive strategies to market your services.