The document discusses the growth and strategy of Startup Digest, an email newsletter for tech startups. It grew from 22 to over 31,000 subscribers in 26 weeks and expanded from 2 to 34 cities in 16 weeks. The document provides tips for email campaigns, including making emails personal, ensuring opt-ins, adding value for subscribers, and presenting exclusive content. It argues that email remains an important channel for reaching customers directly and personally.