
Email makes it easy to segment your customers using a variety of criteria like demographics and past campaign behaviour (such as clicking a certain link). This way you can ensure your message goes to the individuals most likely to be interested in your offer.
More than any other form of marketing, email can provide actionable data on the results it generates, keep track of who opened your email and when, what topics they were interested in, who forwarded it on to a friend, how many sales were generated and much more.