A search engine is a website that lets you search the World Wide Web to find pages devoted to a specific topic. The best known search engine is Google, which we’ll use in our examples. However, there are many other search engines, including Yahoo, Bing and Ask.
Search engines don’t really search the whole Web, as this would take far too long. What they do is “crawl” the Web at intervals to build a database or index. It is this index that they actually search when you enter a query, so the process is much quicker than searching the whole Web.
If a query doesn’t produce many results, you may find it useful to try searching for a related term. For example, instead of searching for “cars” you could search for “automobiles” or “motor vehicles”.
Search engines take different factors into account when building their indexes, so they may produce different results for the same query.
Check the following sites for additional information about searching the web:
Learn the Net
Next: Search Techniques