Public information on the deep Web is currently 400 to 550 times larger than the commonly defined World Wide Web. The deep Web contains 7,500 terabytes of information compared to nineteen terabytes of information in the surface Web.
What is Deep Web
- The deep Web contains nearly 550 billion individual documents compared to the one billion of the surface Web.
- More than 200,000 deep Web sites presently exist.
- Sixty of the largest deep-Web sites collectively contain about 750 terabytes of information — sufficient by themselves to exceed the size of the surface Web forty times.
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- On average, deep Web sites receive fifty percent greater monthly traffic than surface sites and are more highly linked to than surface sites; however, the typical (median) deep Web site is not well known to the Internet-searching public.
- The deep Web is the largest growing category of new information on the Internet.
- Deep Web sites tend to be narrower, with deeper content, than conventional surface sites.
- The total quality content of the deep Web is 1,000 to 2,000 times 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 ninety-five percent of the deep Web is publicly accessible information — not subject to fees or subscriptions.
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