How does the content and quality of the Deep Web differ from the “surface” Web?
Deep Web sites tend to be narrower with deeper content than conventional surface sites. Total quality content of the Deep Web is much greater than that of the surface Web. Deep Web content is highly relevant to every information need, market and domain. More than half of the Deep Web content resides in topic specific databases. A full 95% of the Deep Web is publicly accessible information — not subject to fees or subscriptions.