The document discusses responsive web design and the Omega theme for Drupal. It defines responsive design as crafting sites to provide an optimal viewing experience across different devices. It notes the growing number of internet browsing devices as a reason for needing responsive design. It then introduces the Omega theme for Drupal as a configurable HTML5/960 grid base theme that allows regions and layouts to be modified through the user interface and Context module. It also briefly mentions related modules like Picture, Responsive Images, and Responsive Menu that can be used with Omega.