The document discusses the purpose and capabilities of CSS3. It notes that CSS3 allows for beautiful formatting of information including shadows, transparency, gradients and animations. It highlights some new CSS3 features like keyframe animation, media queries to control formatting across devices, template layout replacing floats, 3D manipulation with perspective, touch specifications, and properties like box-shadow, text-shadow and more. The document emphasizes that CSS3 development is modular and that front-end developers have increased responsibility.