This document discusses the growing importance and opportunities in mobile development. It notes that smartphones are being adopted faster than any other technology in history. Mobile usage is also surpassing desktop web usage, with people using their phones for many tasks. There are over a million apps available across major app stores and emerging areas of development like augmented reality. The document defines mobile development and outlines the growth of Android as a platform. It suggests that as Android is integrated into more devices, there will be greater opportunities for developers. The benefits of a career in mobile development are highlighted as good pay, interesting projects, and working with diverse teams.