WhatsApp exists to build a better SMS alternative and was founded by two former Yahoo employees. It has over 1 billion active users but currently does not generate revenue. The document discusses potential monetization strategies for WhatsApp such as introducing a freemium model with personalized stickers, emojis and cards. It also proposes expanding WhatsApp's functionality by allowing companies to message users directly and integrating public services. The document projects that these changes could generate billions in annual revenue by 2023 while enhancing customer loyalty and appeal through a growing feature set and user base. Risks around privacy, complexity and partnerships are also addressed.