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.
A Meta-search engine are search tools that send a user request to several other search engines and/or databases and aggregate the results into a single list or displays them according to their source. A Metasearch engine enables users to enter search criteria once and access several search engines simultaneously.
Metasearch engines do not crawl the Web or maintain a database of web pages but act as a middle agent passing on the query to the major engines and then returning the results.
These search engines create what is known as a virtual database. Metasearch engines don’t compile a physical database or catalogue of the web, instead they take a user’s request pass it to several other heterogeneous databases and then compile the results in a homogeneous manner based on a specific algorithm.
Metasearch engines provide a quick way to determine and compare which engines are retrieving the best match for your information need.