The short answer: because it works! Email marketing is also extremely cheap compared to other ways of getting new customers.
There are many marketing tools that you can use to get new customers. Few are as effective and inexpensive.
Email Marketing has an impressive ROI
Email returns a stunning $38 for every $1 spent. This is according to a 2015 Direct Marketing Association study. One in five companies in this study reported an even higher ROI of 70:1. You can find even higher ROI claims if you search the Web. The obvious takeaway – Email Marketing is a VERY effective marketing tool.
Email is likely the best marketing tool, online or offline, for most small businesses to use to grow their revenue.
According to a 2009 Datatran Media Study, 39.4% of surveyed marketing executives ranked email as the best performing marketing channel. Email produced better results than SEO, direct mail, social media, mobile, affiliate and traditional media advertising. While this is an old study, we believe email marketing is still king.
Email is the least expensive Marketing Channel
Email has the lowest CPA (Cost Per Acquisition) of any traditional or online marketing channel as revealed in the last published Response Rate Report in 2015. It is cheaper than TV, radio, direct mail, traditional media advertising, social media, mobile, paid search and Internet display advertising.
The primary expense associated with email marketing is the time spent creating and managing email campaigns.
Despite the explosion of new of digital marketing tools, email remains one the most lucrative customer acquisition and retention tools you can use.
Email marketing should be a primary tool of any small business marketing effort.
 Datran Media, 4th Annual Marketing & Media Study, December 200
 DMA, National Client Email Report, 2015
 DMA, Response Rate Report, 2012