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| A Search Engine Explained |
| Written by Justin Harrison |
| Monday, 24 August 2009 07:21 |
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With the widespread growth of the World Wide Web a specially designed tool to search through the information available was developed called the search engine. Using both algorithms and human editing the search engine will present results organized in a list consisting of web pages, information, links, and images. These results are viewed by the user after inputting a keyword or keyword phrase in to the search engines search field.
With the widespread growth of the World Wide Web a specially designed tool to search through the information available was developed called the search engine. Using both algorithms and human editing the search engine will present results organized in a list consisting of web pages, information, links, and images. These results are viewed by the user after inputting a keyword or keyword phrase in to the search engines search field. The search engines stores millions of pages of data available on the web and then uses different processes to deliver the most relevant data required by the users. Web crawling, indexing and searching are different processes that are used for the purpose and the order remains the same. The web crawler which is also known as the web spider works by scanning all the visible links. The web crawler, working as an automated web browser, examines all the pages and takes a decision on the indexing of the pages. Words found inside the pages are extracted from the description and allocated appropriate meta tags. Meta tags are also taken from contents the webpage itself to establish its relevance. Data from the sites is collected, indexed and stored to be retrieved when it's needed. All the search engines work on more or less the same principle. Google stores the source pages, also called cache, of all the web pages along with information available on the webpage itself. AltaVista differs slightly in operation as it stores everything that a web page has on offer. Search engines will examine keywords entered by the user and obtain a list of organized search results. Summaries may also accompany web links on the results page. All the search engines look to enhance their performance by ensuring that they deliver exactly what the user looks for. The problem is accentuated by the abundance of web pages containing the keyword or the keyword phrase. However, by using web crawlers and indexing, search engines manage to filter all the sites that are irrelevant to the search being made even if it has the keywords. They have created their own unique processes for examining different web pages and their contents. Some search engines use page rankings to assist in their sifting. The search engines look at each individual page and determine through their meta tags, descriptions, keywords and content if the sites are relevant based on the key words in the search. The higher a site is ranked, the higher to the top of the results inventory it will be. The search engine sometimes uses other websites to help determine how highly a site should be ranked. If your page is linked to a higher page, it means that your page will have a higher rank in the search outcome. About the Author: Justin Harrison is an internationally recognised Internet Marketing expert who provides world class Search Engine Optimization to website owners. For more information visit: http://www.seorankings.co.za |