The document discusses digital brains and how they are analogous to human brains. It compares the hindbrain, midbrain and forebrain of human brains with different functions of digital brains like indexes, forms, widgets, analytics, sharing features, and overall design and functionality. It suggests that digital brains can help people communicate, search, and share information more efficiently. It also discusses concepts like digital evolution, natural digital selection, and how features can help digital entities survive and thrive on the internet.