The document explains the difference between the surface web and deep web, highlighting that the deep web is significantly larger and mostly inaccessible via conventional search engines. It discusses tools like Tor for anonymous internet usage and Bitcoin for private transactions, along with the positive aspects of the dark web, such as enhanced security and communication. However, it also addresses the presence of illegal activities on the dark web and concludes that the deep web remains a complex and underexplored part of the internet.