Well, there are four types of search engines currently we have:
1. Automatic search engines:- These are based on information that is collected, sorted and analyzed automatically.
2. Directories:- In these search engines the information is put together by editors.
3. Pay per click sites:- This allow you to advertise to be listed for relevant keywords.
4. Master Search sites:- This are combination of the results produced by other search engines.
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