Many of the Web's Most Extensive sites work like libraries. These database sites keep tucked away Their information in the stacks, and if you want something, you Have to ask for it. Although search engines visit May These libraries, They Rarely Make It Past the lobby, and They refuse to ask for help the librarian. This you cause them (and you) to miss out on the massive amount of information stocked in the back rooms. This material is hidden Referred to as part of the "deep" or "invisible" Web.

• Information in databases Can only be accessed by direct searches (searches from Within the site Itself), Which Prevents Finding it from search engines.
• White pages, electronic books, online journals, image files, newspaper archives, dictionary definitions and patents are examples of the file types found in databases. Changing or frequently updated information, like ticket prices and job listings, are Also part of the deep Web.
• Although ITS exact size is unknown, the deep Web is Believed to be 400-550 times larger surface Than the Web (the area accessible to search engines.) Finding One trick for databases with standard search engines is as simple as Adding the term "database" to your search query. Instead of "Buddhism," try "database Buddhism." By doing this, you are using the search engine to find a gateway to more information, Rather Than the information itself.
• Occasionally Online databases require users to pay for access to Their content. Schools and libraries subscribe to Various database services, so consult your librarian for a list of resources That They May make available to you. Otherwise, consider your research goals is to determine Whether paying Worthwhile.