Meta Search Engines
Meta search engines are search engines that show result coming from different search engines. For example, if you insert the keyword “car” in a meta search engine and you search, results from Google, Yahoo and/or other search engines are displayed as if you manually searched on all engines supported. Some meta search engines can even allow you to personalise them by adding new engines for result searches.
When many engines have similar results, the quality of a meta search engine may be more about the way results are merged together and rated for relevancy.
Personalisation and powerful functions may also be score winners.
If the meta search engine is not good at sorting the results, has the wrong set of features and layout or is not easy to personalise, the final result may be worse that the best of the engines it uses to gather results.