This document discusses adapting websites to responsive web design. It defines responsive design as creating interfaces that react quickly and positively to user conditions. It notes that people access websites in many ways, so responsive design aims to have one code base that works across devices rather than separate mobile sites. The document outlines four goals for responsive design: content parity across devices, speed optimization, future-proofing the design, and accessibility. It provides examples and tips for achieving each goal, such as conducting content audits, optimizing images, caching, and designing first for touch interfaces. The results of implementing responsive design on one website included increased mobile traffic and conversions as well as reduced exit rates.