Quality of results
Results can vary between metasearch engines based on a large number of variables. Still, even the most basic metasearch engine will allow more of the web to be searched at once than any one stand-alone search engine. On the other hand, the results are said[who?] to be less relevant, since a metasearch engine can’t know the internal “alchemy” a search engine does on its result (a metasearch engine does not have any direct access to the search engines’ database).
Metasearch engines are sometimes used in vertical search Vertical search, or domain-specific search, part of a larger sub-grouping known as "specialized" search, is a relatively new tier in the Internet search industry, consisting of search engines that focus on specific slices of content. The type of content in special focus may be based on topicality or information type. For example, an portals, and to search the deep web The deep Web refers to World Wide Web content that is not part of the surface Web, which is indexed by standard search engines[citation needed].
<<Table of Contents A meta-search engine is a search tool that sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the | Next>> | Show All>>
