Research on the World Wide Web
Every time you type in a query in a meta-search engine, it searches a series of search engines and directories at the same time, compiles their results, and displays them either by search engine employed or by integrating them in a uniform manner.
Meta-search engines are best to use when you want a general search and aren't sure where to start. By providing you results from a series of sites, they help you to determine where to continue focusing your efforts. They also allow you to compare what kinds of results are available on different engine types or to verify that you haven't missed a great resource provided by another site, other than your favorite search engine. Overall, they're a great way to save time. Some good meta-search engines are:
Zoo - Zoo has been created to give you the best search results available on the Web by searching all the most populare engines and retrieving the best combined results.
Dogpile - my favorite...Dogpile returns all the best results from leading search engines including Google and Yahoo!, so you find what you’re looking for faster.
When you find a search engine that you like or are comfortable with, go to the help area or the area that gives you tips on how to search. By looking over this information, you can easily become a very proficient searcher and will be able to do great searches quickly and easily.