This document provides an introduction to mobile web platforms and mobility. It describes mobility as transforming the user experience from a desk to anytime, anywhere access. Mobility includes consumer uses like gaming, shopping and social media, as well as enterprise uses like retail offers, banking, and healthcare monitoring. The document outlines the logical landscape of consumer and enterprise mobility and the physical ecosystem of mobile components, middleware, and platforms. It describes the typical software stack of a mobile platform including the operating system, libraries, and application development frameworks. The document also compares different approaches to mobile app development, including native, hybrid, and web/HTML5.