How Search Engines Work White Paper www.i-marketing.asia email@example.com Tel +44 (0) 208 1234 164 Tel +66 (0) 898 740 040 H ow search Engines Work White Paper The Basics The objective of any search engine is to provide the user with the most appropriate list of web sites based on the words a user types into the search engine search box – in other words the most relevant answers. Description Search Engine Actions Search engines run automated programs, called "bots" or "spiders" that use the Search Engine crawls the Web hyperlink structure of the web to "crawl" (Finds the page) the pages and documents that make up the World Wide Web. Once a page has been crawled, its contents are "indexed" - the data Webpage is indexed is stored in a giant database (Stored in database) (search engine "index"). The index is the basis for the list of websites produced when a user searches online. B uilding Search engine refers to its index. This index User enters search query enables the searching and sorting of billions usiness Online (Asks for info) of documents to deliver the MOST relevant sites - very quickly. When a request for information comes into Search Engine processes query the search engine, the engine retrieves (Extract pages from database) from its index all the matching site (pages) that match the query. Once the search engine has determined which results are a match, the engine's algorithm (a mathematical sorting equation) Site ranking runs calculations on each of the results to (Orders the results) identify which is most relevant to the given www.i-marketing.asia query. They order these on the results pages from most to least relevant. firstname.lastname@example.org Tel +44 (0) 208 1234 164 Tel +66 (0) 898 740 040 This all sounds simple, but the volume of users and the amount of informa- tion to index means the search engines need to process millions of calcula- tions every second. www.i-marketing.asia H ow search Engines Work White Paper Information Retrieval Modern search engines rely on the scientific process of information retrieval. There are two critical elements,which power this process: Relevance (Content) - the degree the content of the webpage matches the user's query. Search engines look at whether the search terms are found in important areas of the webpage, namely: - Content - Keywords - Metatags - Links - Consistency in all the above The engines collect data based on the frequency of use of terms and the co-occurrence of words and phrases throughout the web. If certain terms or phrases are often found together on pages or sites, search engines can construct intelligent theories about their relationships. Mining semantic data (the science of language) has given search engines some of the most accurate data about word combinations ever assembled artificially. This immense knowledge of language and its usage gives them Building Online the ability to determine which pages in a site are topically related, what the usiness topic of a page or site is, how the link structure of the web divides into topical communities and much, much more. Popularity (Links) - the relative importance, measured via the number and quality of recommendations of a given webpage that match the user's query. The popularity of a webpage increases with every document that references it. - Who is linking - Is the link relevant - Do the sites relate and does their content relate - How important are the sites that are linking - Trust value of each site www.i-marketing.asia email@example.com - Historical link data Tel +44 (0) 208 1234 164 - Site registration (Date of registration) Tel +66 (0) 898 740 040 Link metrics are in place so that search engines can find information to trust. In the academic world greater citation meant greater importance, but in a commercial environment, manipulation and conflicting interests interfere with the purity of citation based measurements making validation of the source and the context vital for ensuring quality resultsing quality results. www.i-marketing.asia H ow search Engines Work White Paper Algorithm The algorithm then determines scoring for the documents and ranks the results in decreasing order by using the relevance and popularity of the site combined with hundreds of other factors that can be individually measured and filtered through the search engine algorithms. What Hinders a Search Engine? Some navigation slows down or can even completely stop search engines from reaching a website's content. As search engine spiders crawl the web, they rely on the architecture of hyperlinks to find new documents and revisit those that may have changed. If there are complicated website structures with little unique content and complex links then a Search Engine will be slowed down, if there are no links then a Search Engine simply stops and moves to a different website. The key to ensuring that a site's content can be crawled is to provide direct, HTML links to each page. If a page cannot be accessed from the home page it will be unlikely to be indexed by the search engines. Building Online usiness About i-Marketing i-Marketing is a marketing agency assisting companies in developing online business. Based in Asia, we bring together professional, qualified European marketers and strong technical skills which when linked to the low Asian www.i-marketing.asia cost base provide exceptional value. Using technology as an enabler and creatives designed to appeal to your target audience we optimize websites and develop marketing campaigns to make your products and services more visible. firstname.lastname@example.org Tel +44 (0) 208 1234 164 Our core markets are Europe and Asia Pacific. Our customers benefit from our internet marketing skills, value for money from access to the low cost base of Asia and our knowledge of successful marketing practices across Europe Tel +66 (0) 898 740 040 and Asia. DISCLAIMER: The content provided in this article is not warranted or guaranteed by i-Marketing Co. Ltd. The content provided is intended for educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our collateral. www.i-marketing.asia
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