The Internet can be a great resource tool if it is used effectively. Through the use of search engines or databases of Web pages that can be searched with a keyword, finding exactly what you want can be easy.
What Is A Search Engine?
There are millions and millions of web pages on the Internet just waiting for you to find them. The problem is locating the page that has that special bit of information you need. Internet search engines are special sites on the Web that are designed to help people find information stored on other sites. Search engines sometimes work in different ways, but they all do these 3 things:
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They search the Internet based on key words.
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They keep a listing of the words they find, and where they find them.
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They allow users to look for words or combinations of words found in that index.
Before a search engine can locate information it employs special software robots, called spiders, to collect lists of the words found on Web sites. When a spider is collecting its lists, the process is called web crawling. In order to build and maintain a useful list of words, a search engine's spiders have to look at a lot of pages. The spider starts a popular site, indexing the words on its pages and following every link found within the site. In this way, the spidering system quickly begins to travel and spread out across the most widely used spots of the Web.
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