Conducting a thorough analysis of the importance and purpose of a search engine is very crucial. This investigation should be done before you actually register your web site. Even though a majority of users believe that a search engine is simply a huge application that seeks information; a search engine is really three different applications that work together to find and retrieve content.
According to Wikipedia.org, a search engine is designed to search for information on the World Wide Web and FTP servers. The search results are generally presented in a list of results and are often called hits. Search results can consist of web pages, images, information and other types of files.
The three applications that make up a search engine include:
Indexer – The back-end application that finds and indexes pages for inclusion in a database; other names for this type of application include spider, robot, and crawler.
Database – Stores the index references to web pages.
Query Interface – Handle the questions submitted by users.
Web search engines work in the following order: web crawling, indexing, and then searching. It is not hard to tell which online search engines are the most popular. Statistics show that a high percentage of online users search for information on search engines such as Google, Yahoo, MSN/Bing, and AOL.
Search engines do not always store all the data in a web page. As an alternative, they create indexed references to the pages. Majority of the time, such an indexed reference contains the following information:
• Summary Description
• Page Title
• Keyword List
• Page URL
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