The document discusses the concept of a 'portal' in the context of app development, using a 'Lego set' analogy to describe the various components required for building a portal such as portlet containers, navigation, and security features. It highlights the integration of multiple applications on a single page and refers to standards like JSR 168 and JSR 286 to improve functionality and collaboration between different technologies. The presentation emphasizes the ease of use and shared resources within a portal environment, illustrating how developers can implement complex systems without starting from scratch.