A search engine, such as Google and Yahoo, are tools that allow users to find information on the World Wide Web by searching with a specially designed tool. The results of a search are organized into a list which includes web pages, information about them and links to them. In some cases, it includes images. Search engines are operated algorithmically in conjunction with human editing.
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.
Mata tags and even words from the webpage are studied to classify the webpage and its content. All these data are stored for future usage.
The major search engines, such as Google amass all, or a miniature portion of the source page, or “cache”, in addition to information the web page offers. The search engine, AltaVista stores every word from every page. Storing the cache helps the search engine filter more easily because web pages are updated constantly. Google’s technique of indexing relieves the “linkrot” and allows users to be sure that the content they find in their search results will be up to date and utilizable. The cache can be helpful when obsolete information is removed. The cache allows users to find and recover information from archived sources.
Search engine users normally input a keyword or key phrase into the search field. The engine will search for their particular keyword and key phrase on the World Wide Web. The search engine index will provide an organized list of results with the best matched web pages. A short summary of each webpage describing the contents is provided along with the list.
The goal of major search engines is to supply the most relevant results. Not all sites with the requested keywords are relevant to the search. The search engines have used their spiders and indexing to filter out useless information. They generate their own system for analyzing a website for content.
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.
Justin Harrison is an internationally recognised Internet Marketing Consultant expert who provides world class Search Engine Optimization to website owners. For more information visit: http://www.seorankings.co.za
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