This document discusses web accessibility and provides an overview of key topics including what web accessibility is, the impact of accessibility, and how to get started with accessibility. It defines web accessibility as designing websites to ensure content is accessible to all users regardless of ability. It discusses the history and guidelines around accessibility, including the Web Content Accessibility Guidelines (WCAG). It notes that while the guidelines tell us what to do for accessibility, they do not tell us how to do it. The document recommends planning an accessibility approach, learning about the guidelines, advocating for accessibility, and including accessibility in all aspects of web design and development.