Search Engine Essentials - The exact information...
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The exact information that robots store within the search engines database is kept a secret so as to prevent 'spamming' of the search engines as much as possible. Despite this, it is fairly easy to decide which elements of the page that the search engines are most likely to record.
When a user performs a search within a search engine, the results are presented as a list of web-pages that relate to the search-term. These pages are known as 'Search Engine Results Pages' or SERPS. Search Engines attempt to place the most relevant pages to any given search-term at the top of the SERPS. Therefore, the aim of all Search Engine Optimization (SEO) techniques is to get a web page as close to the top of these SERPS as possible.
The complex algorithms used to calculate which web pages are most relevant to a given search-term are kept a closely guarded secret by the search engines. Once again this is to prevent spamming of the search engines as it is within the search engines interests to make sure the results presented in the SERPS are as accurate and therefore as useful as possible. Search Engines make money by selling advertising space on their web-pages. Advertisers will only pay to advertise if the pages are viewed by millions of people, and people will only continue to use a search engine if it provides them with useful results. It is therefore important that the pages listed in the SERPS as accurate as possible and not influenced by Search Engine spamming techniques.
Features of some Specific Search Engines.
Search engines have much in common with each other, but each also has its own unique features and peculiarities. It is also worth noting that many search engines share the same database or use the same algorithms, so all are inter-related to varying degrees.
Google is at the moment the most popular and therefore most important of the search engines. It generally provides users with highly relevant SERPS, has a wide coverage and has a clean, easy to use interface. It also offers the ability to search for things other than just web pages, such as images, the contents of newsgroups etc.
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