Your adventure in email marketing is almost at its end. You’ve spent hours designing your email, composing exciting text and compiling your mailing list. You hit the send button and then wait for the revenue to pour in. But how can a small-business owner tell if any of this is working? How can you differentiate sales that come in via your e-newsletter from other sources? To answer these questions, we’ll turn our focus to email marketing analytics. In this article, we’ll define some key terms and discuss how analytics data can inform your marketing strategy.