The document discusses Meteor, an open source full stack framework for building reactive real-time applications. Some key principles of Meteor include using pure JavaScript on both client and server, automatically updating templates when data changes, allowing direct database access from client code, and compensating for latency so clients see updates immediately. Meteor also supports hot code pushes, embraces existing frameworks, and has a large ecosystem of smart packages. The document promotes Meteor as a better way to build apps due to its real-time capabilities, use of a single language, supportive community, time savings from packages, developer happiness focus, and being ahead of technical trends.