T he single, most frequent piece of search advice for using Web search engines is to always search more than one engine to answer your question. No two engines are the same-each offers a unique set of search features and indexes or crawls the Web differently. It's no surprise that the results vary.
Good searchers triangulate output from several engines to achieve relevant results.
The emergence of meta search engines is a credible antidote to the time-consuming practice of sequential search engine searches. By using a meta search engine to search several engines at once and obtain ranked, clickable results, Web searchers can accomplish the Internet equivalent of doing a Dialog OneSearch. From one search screen, a searcher can select several search engines, formulate a search, click the Search button, and quickly receive ranked, compiled results. However, a study of 15 to 20 engines reveals some common options and features that searchers should consider in evaluating which meta search engine will best meet their needs. Searched Determining which and how many search engines the meta engine searches sounds like a simple item, and in some metas it is as easy as viewing the checkboxes on the opening screen.