The document discusses the vision for the Semantic Web as proposed by Tim Berners-Lee in 1999. The Semantic Web aims to allow computers to understand the meaning and relationships between information on the web, rather than just display it blindly. This would enable more intelligent searching, recommendations, and interactions between people, computers, and online information and services. The key aspects that distinguish the Semantic Web from the existing web are adding semantics, or meanings, to the online content so computers can comprehend it, and representing things in the world like people, places, and events, rather than just documents.