Generally speaking, meta search engines perform searches using a conglomeration of other search engines. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines. This also may save the user from having to use multiple search engines separately.
Search engines have a system of algorithms that works on crawling the information written in the body of the HTML. Meta search engines have a system of algorithms that crawls the meta tags, meta title and meta description of the HTML Examples for meta search engines are megaspider.com , metaspider.com , clasearch.com Examples for search engines are Google.com , Bing.com , Avasearch.com, Yahoo.com You also have meta-search engines for a number of specialist subjects such as navigatejob.com which is a job search engine.
An example of non-meta-search engine is Google unlike Bing
Discovery
There are two types of search engines 1. Hybrid search engines 2. Meta search engines
A meta search engine (or aggregator) is a search instrument that uses another search engine's information to deliver their own particular results from the Internet. Meta search engines take data from a client and all the while convey inquiries to outsider search engines for results.
That is not exactly true. A "meta search engine" pays importance only to the meta tags and meta discriptions of the HTML code. A search engine that searches many search engines is a mashed search engine, because it mashes the api of dfferent search engines. Examples for meta search engines are: http://metaspider.com/ or http://megaspider.com/ (very old) Examples for mashed search engines are: http://dogpile.com/ or http://avasearch.com/
Meta engines search for information on different search pages at the same time. If someone typed in "hummingbirds" they would search on two or three search pages at once.
When search engines crawl your site they often look for the meta-tags to give them a better idea of what the website is about. In terms of search engine optimization, the following meta tags are the top meta tags to use, when trying to get your website indexed with major search engines. * Title * Keywords * Description
The search engine visits billions of websites and creates a database or repository of sorts of the various sites. As it turns out a search engine that searches multiple sites but not the entire web is also known as a meta search engine (although the definition is not very popular). Google Custom Search Engines (CSE's) are an excellent example of such search engines. The part of meta search engine includes Meta tag, Meta description, Meta data etc.
There are primarily three types of search engines: traditional search engines, vertical search engines, and meta-search engines. Traditional search engines like Google and Bing index the entire web and return results based on algorithms. Vertical search engines focus on specific niches or industries, such as medical or academic searches. Meta-search engines aggregate results from multiple search engines to provide a broader range of information.
Meta search engines combine results from different search engines. Some examples of this are mamma.com and dogpile.com.
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